GB/T 8429-1998 Textiles - Tests for colour fastness - Colour fastness to weathering: Outdoor exposure
Some standard content:
GB/T8429—1998
This standard is based on ISO105-B03.1S94 product packaging test, and is revised on GB/8429—1987. The revised text is equivalent to ISO205·B33, and the following points are made in this standard: 1. According to the revised source information of G/T1.1-1993 and ISO5.3.17, the layout and format of the standard are changed, and the preface and standard are added.
2. According to the procedures of ISO105-B03.1S94, the introduction is added to the second chapter, and the original note is renumbered as 7.5.
. The content of the test report is added.
5. Appendix A (attached to the specification) is added.
6. The length is changed to m,
7. The requirements for measuring environmental conditions are added
8. The original method 3 is revoked. A new method 3 is added. This standard replaces B/T842$-1997 from the date of implementation. This standard is proposed by the China National Textile Association Standardization Technical Committee Basic Standards Branch. This standard is jointly drafted by the China National Textile Association Standardization Institute, Shanghai Textile Industry Technology Supervision Institute, Shanghai Textile Science and Technology Research Institute, Beijing Wool Textile Association Scientific Research Institute, and the main promoters are: Ben Zhijin, Ben Ji, Zhang Qiping, Fang Wenshou, Fan, Shi You. This standard was first published in 1917 and revised for the second time in 2018.21
GB/T8429-1598
ISO Foreword
[ISO (International Organization for Standardization) is an alliance of national standards organizations: ISO has a membership of 1598). The preparation of international standards is usually proposed by ISO technical committees. All parties interested in the items established by ISO technical committees have the right to set up committees. It is advisable to contact non-governmental international organizations and 150, or to keep in close contact with the International Electrotechnical Commission (JEC) in the work of ISO standardization. The international standard proposals adopted by the technical committee will be circulated to the members for voting, and 25% or more will be used to publish them as international standards. International Standard 15C105-B0.15O/TC58/SC1 Technical Specification for Color Textile Products and Total Material Testing. The 4th edition was technically revised and the 3rd edition (1S(105-R03:1988) was cancelled. 15010% has been issued 13 parts, each part is represented by a letter (such as \A\), and the version is from 1978 to 185. Each part consists of a series of "points", each of which is indicated by a two-digit series number (i.e. "A01"). These are now published separately, and the original "part" headings remain unchanged. 1S1U5AC gives the entire contents of IS1C5. The appendices to this part are only indicative appendices. 22
National Standard of the People's Republic of China
Textiles
Colour fastness tests
Colour fastness to weathering: Outdoor exposure
Texliles-Tests far culour fastness-Culour fastness lu weallteraningOut door exposureGB/T 8429 -199
eq1so105-B03.1992
8429-1557
This standard specifies a method for determining the color resistance of various textile products other than fibers to the action of outdoor condensation. 2 Referenced standards
The following standards contain blanks and are valid for use in conjunction with this standard. The versions shown are valid for publication. All standards are subject to revision. Users of this standard should consider the possibility of using the latest version of the following standard: G:5 250—_99 Color change assessment or color sample (:r!/ T$0 1U5 42:1993) G373C-93 Fabric single-layer test face light and air fastness monitoring color standard GB/15921.1 1997 Product color fastness test and color fastness test: test 1 (e4150) 105-C01:1994) GB/T6151-1:U!7 Textile product package fastness test chamber test (eg VIS0105-A01:1994) GB/T6426909 Fabric color fastness test and light color type: sunlight (eg V1SO10 5-B51:1994) 3 Principle
3.1 The natural fabric is exposed to natural air in a large area, under no protective conditions, and eight pieces of standard wool are placed under a blanket at a certain time. Then the color change of the sample is compared with that of the colored wool standard to evaluate the fastness. 3.2 Since the outdoor weather conditions vary greatly, it is necessary to conduct repeated exposure tests in different seasons and take the average after the test.
4 Standard materials and equipment
4.1 Standard materials
The standard used in the test shall comply with the provisions of GB/T115CR3). 4.2 Equipment
4.2.! Choose the drying rack: the height of the drying rack should be equal to the height of the drying rack in a straight line with the ground. It is better to place it in a residential and non-industrial area, without dust, and with air quality. The safety position of the drying rack should ensure that the shadow of objects will not fall on the rack, and the structure of the drying rack should be able to transmit The specimen or the specimen chain (see 5.1) can be securely fixed. Air can circulate behind it.
1.2.2 The blue wool standard can be placed according to the requirements of 1.2.1, but it is safe to use the blue wool standard. It must have a surface test rate. Its light transmittance is 380nm~753nm and the fire Sc is reduced to 0.4.2.3 Reflective material: It is not suitable for light village materials, such as bullet films or video cards. If the test object is a head identification object, harmful objects should be avoided from being exposed to the surface of the identification object.
Approved by the State Quality and Technical Supervision Commission on November 75, 1998 and implemented on May 1, 1999
GB/T8429—1998
4.2.2 The grey scale for evaluating color change shall comply with GB250.4.2.5. The instrument for measuring environmental data shall be operated close to the drying rack when drying is in progress. To calibrate the ambient conditions around the rack, these instruments shall be able to record ambient temperature (daily high and low), relative humidity (daily high and low), rainfall duration, total rainfall duration (rainfall and dew), total transient and ultraviolet radiation (whether broadband or narrowband) and relative humidity at the same drying angle of the sample (maximum and minimum of each drying angle). These data shall be used as the basis for the test results. 5. Test Specimens || TT || 5.1 Test specimens with dimensions not less than 40 mm × 1 mm (one of which shall be original) 5.2 Fabrics: Directly fixed on the drying rack or sewn onto a water-based white fabric (such as case fabric or nylon) and then fixed on the drying rack, | |tt||5.3 Yarn: Determine the structure of the yarn and the texture, and then treat as described in 5.2. 5.4 Fibers are not suitable for weathering color test. 5.5 Place the blue half wool standard on the reading card and cover one third of the same part. 6 Dyeing Procedure
6-1 Method 1, 23 General Operation Procedure
Put the sample or the fabric wrapped around the sample on the thick drying rack (see 4.2.1). Place the already installed and partially covered blue 1 wool on the rack with glass (see 4.2.2), and dry the sample and blue wool cup at the same time for 24h. Regardless of the age, the pressure is 3 (see 6.2 to 6.4) + The number of days of drying depends on the requirements of the evaluation point: 6.2 Method 1 || tt || 6.2.1 This method has been proven to be satisfactory and is mandatory in case of disputes. Its basic characteristics are to set the drying cycle by checking the actual situation. Each sample needs to wait for a period of time. 6.7.7 Dry the blue wool standard according to the new method in 6.1 until the color difference between the test sample and the original sample reaches 3 points on the gray scale. Take out one of the pieces and use another object to track the color of the blue wool standard. 6.2.3 Continue drying until the color difference between the test sample and the original sample reaches 2 points on the gray scale. If the blue wool standard is not dry, the test sample will be dried. Wool standard 7 before this shipped to the color sample card 1 level, then the taste of the girl to this wrong bundle. The test details and blue wool mark under the chrysanthemum. 6.2.1 Wash the sample and the spot sample for grading (see 6.5). 6.2.5 The severity of the general method 7.1-7.5 is the evaluation of the climate color half degree. E.3 method 2 || tt || E.3! At that time, there are too many test samples and it is impossible to use the force 1, this method can be used. Its basic characteristics are sufficient to check the wool labeling old control plan instantaneous wealth period, and it is allowed to use the blue blue wool standard to test batches of samples with different climate half courts. From the previous section, the blue core mark is only used for the test details and color sheep.6.3.3 Continue drying until the color difference between the blue wool standard pile and the gray wool standard pile is reached. 6.3.4 Wash and drain the dried sample and the original piece for evaluation (see 6.4 and 6.5). 6.3.5 7.1--7. If the color resistance of the sample is not in accordance with the approved standard, the test piece can be tested separately or together with the blue wool standard until the specified time is reached, and then the blue wool standard is removed and evaluated according to the provisions of 1. 6.5 Micro-brocade CE/T 6429-1998 392! . Specified recordings, samples that have been photographed and exposed, and an original sample of at least 40mm×10mm (without stickers) 6.6 Sticking samples
Place the washed sample on each side of the washed original fabric. The size and shape of the original fabric should be the same as the sample. The sample with a shorter exposure time should be used in the same place. 7 Assessment of color fastness to air
7. Based on the color difference produced on the same color wool standard when exposed to the same color, assess the color difference between the sample with a shorter exposure time and the original sample. The assessment level is the standard number of the largest color difference of the sample. If the color of the sample is between the two blue single wool standards, please refer to the following points: A medium grade: add 3-4.
7.2 The color difference between the blue wool hand-woven standard produced in the same time is determined by the color difference between the sample with a longer drying time and the original sample. The grade of evaluation is the blue wool standard number that is close to the color of the sample. If the color of the sample is between two blue wool standards, it should be given an individual grade such as 5-6.7.3 If the sample size is larger than the blue wool standard, a neutral color should be used to cover the sample in the same place as the standard when evaluating, and the intermediate color wool standard should be found for comparison. The neutral gray of the follow-up should be between 1 and 1 with the gray sample card used for evaluating color change. The color between and is close (about Mur.gcllN5), 7.4 Method 3 (see 6.4) The color rate evaluation is to compare the GB250 color change with the finished color sample or with the color wool standard: .5 "Color change" not only includes the real "original color", that is, the magnetic damage of the dyed sample, but also includes the change of color saturation, any comprehensive change of these colors, etc. If the color difference between the two colors only changes in hue and brightness, the following absolute value can be added after the color evaluation number to express it;
B1=bluer
Y=yellower
D=darker
Br
If the color is affected by the chemical reaction and the degree of migration changes, it can also be expressed in the following way: W = weaker
Day test rejection
S frequent
The test report should include the following contents:
This standard number GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net number of grades obtained (see 7.1 and 7.2) is different, only the lower one shall be taken; l) For method 3. Report the number of times the test is reported, the color of the wool is considered to be standard. e) The date and place of the start and end of the test, 25
GB/T 8429—1998
Appendix A
(Instructions for Appendix
General Advice on Light Fastness
A1 Fabrics are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes the color of colored fabrics to become lighter or darker. The light properties of dyes used in the textile industry are very important and a method for determining their fastness is necessary. In addition, the color of the dyes can also be affected by sunlight. However, this standard cannot fully satisfy all parties concerned (from dye manufacturers, textile industry to textile wholesalers and retailers and ordinary consumers) because they have not yet fully grasped the technology. Therefore, it may be difficult for many people directly concerned to understand this standard.
A2 The following non-technical test instructions are intended to alleviate the difficulties of understanding the technical aspects of this standard. The test method is to dry the test fabric samples and a group of blue wool standard fabrics dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the market samples have been fully exhausted, the fabric samples will be compared with the blue semi-wool mark. If the color degree of the fabric sample is similar to the blue semi-wool mark 1, then its light fastness color is rated as 4. These light fastness standards should include a wide range, because some fabric samples will obviously change color after 23 hours of instant exposure to strong light in summer, while other fabric samples may not change after several changes. In fact, these materials are more durable than the materials they are dyed with. There are eight marks still in use. Standard 1 is the most reliable standard. Standard 4 is the most reliable standard. It takes a certain amount of time to reach a certain visual color degree under certain conditions. Then, under the same conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must guarantee that people who are not fashionable will not change. When testing the same material, the material should be colored to the same degree before being evaluated against the same standard. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different color levels with the majority of people's understanding. After the color is determined by the "color sample card" of the industry standard (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color monitoring wool standard can determine the color fastness degree. However, using the same standard as the grade is a short-term test. In fact, some expected changes will occur soon, but it will not change for the same limit. These slight changes are rarely noticed under normal circumstances, but in some cases they can become very important, as shown below: a retailer places a piece of fabric on the fabric and places a cardboard label with the price on it. After a few days, the label is removed and a careful inspection can identify where the label has been. Because the label has changed slightly, the fabric has changed color after being dyed. At the same time, it is found that the color fastness of this fabric is similar to that of the wool standard. This slight color change is only noticeable when there is a clear boundary between the color and the light medium. It often occurs on a piece of fabric at the same time. This slight color change can be more accurately described as a pair of The rating of the fabric sample is 72>, indicating that the 2 in brackets is a noticeable decrease in hue from the blue standard 2. In addition, there is a commercial color fastness level 7:
A5. There is also a color change caused by artificial color, that is, photochromism. This effect is now when the dye changes quickly under strong light, and when transferred to a dark place, it will almost return to its original color. The degree of photochromism is determined by the special test specified in B8, and is indicated by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversal is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can change to purple, and blue can also change to black. Whether these samples can be said to be high-end products has been debated in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.4 Wash and drain the exposed test piece and the original piece for evaluation [see 6.4 and 6.5). 6.3.5 7.1--7. If the specified method is used, the color resistance of the sample is not in compliance with the approved method, and the test piece can be kept alone or together with the blue wool standard until the specified time is reached, and then remove the half wool standard and evaluate according to the provisions of 1. 6.5 Micro-brocade CE/T 6429-1998 Press H door 392! . Specified recordings, samples that have been photographed and exposed, and an original sample of at least 40mm×10mm (without stickers) 6.6 Sticking samples
Place the washed sample on each side of the washed original fabric. The size and shape of the original fabric should be the same as the sample. The sample with a shorter exposure time should be used in the same place. 7 Assessment of color fastness to air
7. Based on the color difference produced on the same color wool standard when exposed to the same color, assess the color difference between the sample with a shorter exposure time and the original sample. The assessment level is the standard number of the largest color difference of the sample. If the color of the sample is between the two blue single wool standards, please refer to the following points: A medium grade: add 3-4.
7.2 The color difference between the blue wool hand-woven standard produced in the same time is determined by the color difference between the sample with a longer drying time and the original sample. The grade of evaluation is the blue wool standard number that is close to the color of the sample. If the color of the sample is between two blue wool standards, it should be given an individual grade such as 5-6.7.3 If the sample size is larger than the blue wool standard, a neutral color should be used to cover the sample in the same place as the standard when evaluating, and the intermediate color wool standard should be found for comparison. The neutral gray of the follow-up should be between 1 and 1 with the gray sample card used for evaluating color change. The color between and is close (about Mur.gcllN5), 7.4 Method 3 (see 6.4) The color rate evaluation is to compare the GB250 color change with the finished color sample or with the color wool standard: .5 "Color change" not only includes the real "original color", that is, the magnetic damage of the dyed sample, but also includes the change of color saturation, any comprehensive change of these colors, etc. If the color difference between the two colors only changes in hue and brightness, the following absolute value can be added after the color evaluation number to express it;
B1=bluer
Y=yellower
D=darker
Br
If the color is affected by the chemical reaction and the degree of migration changes, it can also be expressed in the following way: W = weaker
Day test rejection
S frequent
The test report should include the following contents:
This standard number GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net number of grades obtained (see 7.1 and 7.2) is different, only the lower one shall be taken; l) For method 3. Report the number of times the test is reported, the color of the wool is considered to be standard. e) The date and place of the start and end of the test, 25
GB/T 8429—1998
Appendix A
(Instructions for Appendix
General Advice on Light Fastness
A1 Fabrics are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes the color of colored fabrics to become lighter or darker. The light properties of dyes used in the textile industry are very important and a method for determining their fastness is necessary. In addition, the color of the dyes can also be affected by sunlight. However, this standard cannot fully satisfy all parties concerned (from dye manufacturers, textile industry to textile wholesalers and retailers and ordinary consumers) because they have not yet fully grasped the technology. Therefore, it may be difficult for many people directly concerned to understand this standard.
A2 The following non-technical test instructions are intended to alleviate the difficulties of understanding the technical aspects of this standard. The test method is to dry the test fabric samples and a group of blue wool standard fabrics dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the market samples have been fully exhausted, the fabric samples will be compared with the blue semi-wool mark. If the color degree of the fabric sample is similar to the blue semi-wool mark 1, then its light fastness color is rated as 4. These light fastness standards should include a wide range, because some fabric samples will obviously change color after 23 hours of instant exposure to strong light in summer, while other fabric samples may not change after several changes. In fact, these materials are more durable than the materials they are dyed with. There are eight marks still in use. Standard 1 is the most reliable standard. Standard 4 is the most reliable standard. It takes a certain amount of time to reach a certain visual color degree under certain conditions. Then, under the same conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must guarantee that people who are not fashionable will not change. When testing the same material, the material should be colored to the same degree before being evaluated against the same standard. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different color levels with the majority of people's understanding. After the color is determined by the "color sample card" of the industry standard (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color monitoring wool standard can determine the color fastness degree. However, using the same standard as the grade is a short-term test. In fact, some expected changes will occur soon, but it will not change for the same limit. These slight changes are rarely noticed under normal circumstances, but in some cases they can become very important, as shown below: a retailer places a piece of fabric on the fabric and places a cardboard label with the price on it. After a few days, the label is removed and a careful inspection can identify where the label has been. Because the label has changed slightly, the fabric has changed color after being dyed. At the same time, it is found that the color fastness of this fabric is similar to that of the wool standard. This slight color change is only noticeable when there is a clear boundary between the color and the light medium. It often occurs on a piece of fabric at the same time. This slight color change can be more accurately described as a pair of The rating of the fabric sample is 72>, indicating that the 2 in brackets is a noticeable decrease in hue from the blue standard 2. In addition, there is a commercial color fastness level 7:
A5. There is also a color change caused by artificial color, that is, photochromism. This effect is now when the dye changes quickly under strong light, and when transferred to a dark place, it will almost return to its original color. The degree of photochromism is determined by the special test specified in B8, and is indicated by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversal is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can change to purple, and blue can also change to black. Whether these samples can be said to be high-end products has been debated in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.4 Wash and drain the exposed test piece and the original piece for evaluation [see 6.4 and 6.5). 6.3.5 7.1--7. If the specified method is used, the color resistance of the sample is not in compliance with the approved method, and the test piece can be kept alone or together with the blue wool standard until the specified time is reached, and then remove the half wool standard and evaluate according to the provisions of 1. 6.5 Micro-brocade CE/T 6429-1998 Press H door 392! . Specified recordings, samples that have been photographed and exposed, and an original sample of at least 40mm×10mm (without stickers) 6.6 Sticking samples
Place the washed sample on each side of the washed original fabric. The size and shape of the original fabric should be the same as the sample. The sample with a shorter exposure time should be used in the same place. 7 Assessment of color fastness to air
7. Based on the color difference produced on the same color wool standard when exposed to the same color, assess the color difference between the sample with a shorter exposure time and the original sample. The assessment level is the standard number of the largest color difference of the sample. If the color of the sample is between the two blue single wool standards, please refer to the following points: A medium grade: add 3-4.
7.2 The color difference between the blue wool hand-woven standard produced in the same time is determined by the color difference between the sample with a longer drying time and the original sample. The grade of evaluation is the blue wool standard number that is close to the color of the sample. If the color of the sample is between two blue wool standards, it should be given an individual grade such as 5-6.7.3 If the sample size is larger than the blue wool standard, a neutral color should be used to cover the sample in the same place as the standard when evaluating, and the intermediate color wool standard should be found for comparison. The neutral gray of the follow-up should be between 1 and 1 with the gray sample card used for evaluating color change. The color between and is close (about Mur.gcllN5), 7.4 Method 3 (see 6.4) The color rate evaluation is to compare the GB250 color change with the finished color sample or with the color wool standard: .5 "Color change" not only includes the real "original color", that is, the magnetic damage of the dyed sample, but also includes the change of color saturation, any comprehensive change of these colors, etc. If the color difference between the two colors only changes in hue and brightness, the following absolute value can be added after the color evaluation number to express it;
B1=bluer
Y=yellower
D=darker
Br
If the color is affected by the chemical reaction and the degree of migration changes, it can also be expressed in the following way: W = weaker
Day test rejection
S frequent
The test report should include the following contents:
This standard number GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net number of grades obtained (see 7.1 and 7.2) is different, only the lower one shall be taken; l) For method 3. Report the number of times the test is reported, the color of the wool is considered to be standard. e) The date and place of the start and end of the test, 25
GB/T 8429—1998
Appendix A
(Instructions for Appendix
General Advice on Light Fastness
A1 Fabrics are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes the color of colored fabrics to become lighter or darker. The light properties of dyes used in the textile industry are very important and a method for determining their fastness is necessary. In addition, the color of the dyes can also be affected by sunlight. However, this standard cannot fully satisfy all parties concerned (from dye manufacturers, textile industry to textile wholesalers and retailers and ordinary consumers) because they have not yet fully grasped the technology. Therefore, it may be difficult for many people directly concerned to understand this standard.
A2 The following non-technical test instructions are intended to alleviate the difficulties of understanding the technical aspects of this standard. The test method is to dry the test fabric samples and a group of blue wool standard fabrics dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the market samples have been fully exhausted, the fabric samples will be compared with the blue semi-wool mark. If the color degree of the fabric sample is similar to the blue semi-wool mark 1, then its light fastness color is rated as 4. These light fastness standards should include a wide range, because some fabric samples will obviously change color after 23 hours of instant exposure to strong light in summer, while other fabric samples may not change after several changes. In fact, these materials are more durable than the materials they are dyed with. There are eight marks still in use. Standard 1 is the most reliable standard. Standard 4 is the most reliable standard. It takes a certain amount of time to reach a certain visual color degree under certain conditions. Then, under the same conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must guarantee that people who are not fashionable will not change. When testing the same material, the material should be colored to the same degree before being evaluated against the same standard. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different color levels with the majority of people's understanding. After the color is determined by the "color sample card" of the industry standard (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color monitoring wool standard can determine the color fastness degree. However, using the same standard as the grade is a short-term test. In fact, some expected changes will occur soon, but it will not change for the same limit. These slight changes are rarely noticed under normal circumstances, but in some cases they can become very important, as shown below: a retailer places a piece of fabric on the fabric and places a cardboard label with the price on it. After a few days, the label is removed and a careful inspection can identify where the label has been. Because the label has changed slightly, the fabric has changed color after being dyed. At the same time, it is found that the color fastness of this fabric is similar to that of the wool standard. This slight color change is only noticeable when there is a clear boundary between the color and the light medium. It often occurs on a piece of fabric at the same time. This slight color change can be more accurately described as a pair of The rating of the fabric sample is 72>, indicating that the 2 in brackets is a noticeable decrease in hue from the blue standard 2. In addition, there is a commercial color fastness level 7:
A5. There is also a color change caused by artificial color, that is, photochromism. This effect is now when the dye changes quickly under strong light, and when transferred to a dark place, it will almost return to its original color. The degree of photochromism is determined by the special test specified in B8, and is indicated by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversal is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can change to purple, and blue can also change to black. Whether these samples can be said to be high-end products has been debated in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.According to the color difference produced on the same color wool standard when exposed in the same river, the color difference between the shorter test sample and the original sample is evaluated, and the evaluated grade is the standard number of the color difference of the sample. If the sample is between the two blue single wool standards, a medium grade is given: add 3-4.
7.2 to the color difference produced on the blue wool standard in the same time, and determine the degree of color difference between the sample with a longer exposure time and the original sample. The evaluated grade is the blue wool standard number that is close to the color of the sample. If the colour of the sample is between the two blue wool standards, it should be given an interval grade of 5-6. 7.3 If the sample size is larger than the blue wool standard, a neutral shade should be used to cover the sample in the assessment, and the intermediate colour wool standard should be found for comparison. The neutral grey used should be close to the colour of the grey scale used for assessing colour change between grades 1 and 2 (approximately Mur.gclN5). 7.4 Method 3 (see 6.4) The colour rate assessment is based on the GB250 colour change sample or the standard colour wool standard: 5 "Colour change" includes not only the true "original colour", that is, the colour of the dyed sample, but also the change in saturation, chroma, etc. Any combined change in these colours, such as changes in hue and brightness, can be considered. The following absolute indirect radiation is added after the color half-degree rating number to indicate:
B1=bluer
Y=yellower
D=darker
Br
If the color is affected by the change of color, it can also be expressed in the following way W=weaker
Day test rejection
S Frequent
The test report should include the following contents:
This standard is numbered GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net individual grades (see 7.1 and 7.2) are different, only the lower one shall be included; l) For method 3. Report the number of times the test is reported, the color of the wool is considered standard. e) The date and place of the start and end of the test, 25
GB/T 8429—1998
Appendix A
(Appendix A) General information on light fastness
A1 Continued Textiles are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes colored anti-color fabrics to change color, becoming lighter or darker. The light properties of dyes used in the textile industry are very important, so a method for determining their fastness is necessary. In addition, the color of the dyes will also be affected by sunlight. However, it is impossible for all parties concerned (from dye manufacturers, textile industry to anti-color fabric wholesalers and retailers and ordinary consumers) to be fully aware of this standard. Because they have not yet gained in-depth technical experience, they may also be difficult to interpret for many people who are directly interested in this standard.
A2 The following non-technical test instructions are for those who have difficulty understanding the technical details of this standard. The test method is to dry the test sample and a group of blue wool standards dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the test sample has been fully dried, the sample is compared with the blue half-wool standard. If the color of the sample is similar to that of the blue half-wool standard, its light fastness is rated as 4, A. 3 These light resistance standards should cover a wide range, because some fabrics will obviously change color after 23 hours of instant exposure to strong sunlight in summer, while other fabrics may not change at all. In fact, these materials are more durable than the ones they are dyed with. There are eight labels still in use. Standard 1 is for quality assurance, and Standard 4 is for the most hypothetical light resistance. It takes a certain amount of time to achieve a certain degree of color under a certain condition. Then, to produce the same degree of color under polyester and cowhide conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must be guaranteed by people who are not fashionable. When testing the same material, the material should be colored to the same degree before being evaluated against the standard wool. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different degrees of color with the majority of people's understanding. After the color is determined by the color sample card "comparison color difference" (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color sheep giant standard can determine the color fastness rate grade. However, using the same grade and strict grade as the basis for the grade, this form of measurement is short-term and complex. In fact, some expected changes will occur soon, but the same limit will not be changed. These slight changes are rarely noticed under normal circumstances, but in some cases, these slight changes can become very important, as shown below: the retailer puts a piece of fabric on the fabric and puts a cardboard label with the price on it. After a day, the label is removed and a careful inspection can identify where the label has been. Because the label has slightly changed color due to the dyeing, the fabric has developed a slight discoloration after dyeing. At the same time, it is found that the color of the wool standard has reached a similar degree over the period of time: Figure 1. The light fastness of this fabric is: Grade 2, a kind of slight color change effect, is only noticed when there is an obvious boundary between the color and the medium. It often appears on the same textile. This slight color change process can be more accurate. For example, a piece of cloth is rated 72>, indicating that the 2 in brackets is a slight decrease in the hue of the blue wool standard 2. In addition, there is a commercial color fastness grade 7:
A5. There is also a color elastic change caused by light, that is, photochromism. This effect is more accurate. Now when the dye is exposed to strong light, it will quickly change color, but in the dark, it will almost return to its original color. The degree of photochromism is determined by a special test specified in B8, and is expressed by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversion is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can become blue, and black can also become white. Whether these samples can be said to be color-changing has been a matter of debate in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.According to the color difference produced on the same color wool standard when exposed in the same river, the color difference between the shorter test sample and the original sample is evaluated, and the evaluated grade is the standard number of the color difference of the sample. If the sample is between the two blue single wool standards, a medium grade is given: add 3-4.bzxz.net
7.2 to the color difference produced on the blue wool standard in the same time, and determine the degree of color difference between the sample with a longer exposure time and the original sample. The evaluated grade is the blue wool standard number that is close to the color of the sample. If the colour of the sample is between the two blue wool standards, it should be given an interval grade of 5-6. 7.3 If the sample size is larger than the blue wool standard, a neutral shade should be used to cover the sample in the assessment, and the intermediate colour wool standard should be found for comparison. The neutral grey used should be close to the colour of the grey scale used for assessing colour change between grades 1 and 2 (approximately Mur.gclN5). 7.4 Method 3 (see 6.4) The colour rate assessment is based on the GB250 colour change sample or the standard colour wool standard: 5 "Colour change" includes not only the true "original colour", that is, the colour of the dyed sample, but also the change in saturation, chroma, etc. Any combined change in these colours, such as changes in hue and brightness, can be considered. The following absolute indirect radiation is added after the color half-degree rating number to indicate:
B1=bluer
Y=yellower
D=darker
Br
If the color is affected by the change of color, it can also be expressed in the following way W=weaker
Day test rejection
S Frequent
The test report should include the following contents:
This standard is numbered GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net individual grades (see 7.1 and 7.2) are different, only the lower one shall be included; l) For method 3. Report the number of times the test is reported, the color of the wool is considered standard. e) The date and place of the start and end of the test, 25
GB/T 8429—1998
Appendix A
(Appendix A) General information on light fastness
A1 Continued Textiles are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes colored anti-color fabrics to change color, becoming lighter or darker. The light properties of dyes used in the textile industry are very important, so a method for determining their fastness is necessary. In addition, the color of the dyes will also be affected by sunlight. However, it is impossible for all parties concerned (from dye manufacturers, textile industry to anti-color fabric wholesalers and retailers and ordinary consumers) to be fully aware of this standard. Because they have not yet gained in-depth technical experience, they may also be difficult to interpret for many people who are directly interested in this standard.
A2 The following non-technical test instructions are for those who have difficulty understanding the technical details of this standard. The test method is to dry the test sample and a group of blue wool standards dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the test sample has been fully dried, the sample is compared with the blue half-wool standard. If the color of the sample is similar to that of the blue half-wool standard, its light fastness is rated as 4, A. 3 These light resistance standards should cover a wide range, because some fabrics will obviously change color after 23 hours of instant exposure to strong sunlight in summer, while other fabrics may not change at all. In fact, these materials are more durable than the ones they are dyed with. There are eight labels still in use. Standard 1 is for quality assurance, and Standard 4 is for the most hypothetical light resistance. It takes a certain amount of time to achieve a certain degree of color under a certain condition. Then, to produce the same degree of color under polyester and cowhide conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must be guaranteed by people who are not fashionable. When testing the same material, the material should be colored to the same degree before being evaluated against the standard wool. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different degrees of color with the majority of people's understanding. After the color is determined by the color sample card "comparison color difference" (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color sheep giant standard can determine the color fastness rate grade. However, using the same grade and strict grade as the basis for the grade, this form of measurement is short-term and complex. In fact, some expected changes will occur soon, but the same limit will not be changed. These slight changes are rarely noticed under normal circumstances, but in some cases, these slight changes can become very important, as shown below: the retailer puts a piece of fabric on the fabric and puts a cardboard label with the price on it. After a day, the label is removed and a careful inspection can identify where the label has been. Because the label has slightly changed color due to the dyeing, the fabric has developed a slight discoloration after dyeing. At the same time, it is found that the color of the wool standard has reached a similar degree over the period of time: Figure 1. The light fastness of this fabric is: Grade 2, a kind of slight color change effect, is only noticed when there is an obvious boundary between the color and the medium. It often appears on the same textile. This slight color change process can be more accurate. For example, a piece of cloth is rated 72>, indicating that the 2 in brackets is a slight decrease in the hue of the blue wool standard 2. In addition, there is a commercial color fastness grade 7:
A5. There is also a color elastic change caused by light, that is, photochromism. This effect is more accurate. Now when the dye is exposed to strong light, it will quickly change color, but in the dark, it will almost return to its original color. The degree of photochromism is determined by a special test specified in B8, and is expressed by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversion is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can become blue, and black can also become white. Whether these samples can be said to be color-changing has been a matter of debate in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.5 "Discoloration" includes not only the true "original color", i.e. the color change of the dye, but also the change of color saturation, color change and any comprehensive change of these colors. If the color difference only changes in hue and brightness, it can be expressed by adding the following absolute value after the color rating number;
B1=bluer
Y=yellower
D=darker
Br
If the color change is accompanied by a shift change, it can also be expressed in the following way W=weaker||tt| |Daily test rejection
S Frequently encountered
The test report should include the following contents:
This standard number GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net number of grades obtained (see 7.1 and 7.2) is different, only the lower one shall be used; l) For method 3, report the number of times the test is carried out, e) The date and place of the start and end of the test, GB/T 8429—1998
Appendix A
(Appendix A) General information on light fastness
A1 Continued Textiles are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes colored anti-color fabrics to change color, becoming lighter or darker. The light properties of dyes used in the textile industry are very important, so a method for determining their fastness is necessary. In addition, the color of the dyes will also be affected by sunlight. However, it is impossible for all parties concerned (from dye manufacturers, textile industry to anti-color fabric wholesalers and retailers and ordinary consumers) to be fully aware of this standard. Because they have not yet gained in-depth technical experience, they may also be difficult to interpret for many people who are directly interested in this standard.
A2 The following non-technical test instructions are for those who have difficulty understanding the technical details of this standard. The test method is to dry the test sample and a group of blue wool standards dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the test sample has been fully dried, the sample is compared with the blue half-wool standard. If the color of the sample is similar to that of the blue half-wool standard, its light fastness is rated as 4, A. 3 These light resistance standards should cover a wide range, because some fabrics will obviously change color after 23 hours of instant exposure to strong sunlight in summer, while other fabrics may not change at all. In fact, these materials are more durable than the ones they are dyed with. There are eight labels still in use. Standard 1 is for quality assurance, and Standard 4 is for the most hypothetical light resistance. It takes a certain amount of time to achieve a certain degree of color under a certain condition. Then, to produce the same degree of color under polyester and cowhide conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must be guaranteed by people who are not fashionable. When testing the same material, the material should be colored to the same degree before being evaluated against the standard wool. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different degrees of color with the majority of people's understanding. After the color is determined by the color sample card "comparison color difference" (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color sheep giant standard can determine the color fastness rate grade. However, using the same grade and strict grade as the basis for the grade, this form of measurement is short-term and complex. In fact, some expected changes will occur soon, but the same limit will not be changed. These slight changes are rarely noticed under normal circumstances, but in some cases, these slight changes can become very important, as shown below: the retailer puts a piece of fabric on the fabric and puts a cardboard label with the price on it. After a day, the label is removed and a careful inspection can identify where the label has been. Because the label has slightly changed color due to the dyeing, the fabric has developed a slight discoloration after dyeing. At the same time, it is found that the color of the wool standard has reached a similar degree over the period of time: Figure 1. The light fastness of this fabric is: Grade 2, a kind of slight color change effect, is only noticed when there is an obvious boundary between the color and the medium. It often appears on the same textile. This slight color change process can be more accurate. For example, a piece of cloth is rated 72>, indicating that the 2 in brackets is a slight decrease in the hue of the blue wool standard 2. In addition, there is a commercial color fastness grade 7:
A5. There is also a color elastic change caused by light, that is, photochromism. This effect is more accurate. Now when the dye is exposed to strong light, it will quickly change color, but in the dark, it will almost return to its original color. The degree of photochromism is determined by a special test specified in B8, and is expressed by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversion is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can become blue, and black can also become white. Whether these samples can be said to be color-changing has been a matter of debate in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.5 "Discoloration" includes not only the true "original color", i.e. the color change of the dye, but also the change of color saturation, color change and any comprehensive change of these colors. If the color difference only changes in hue and brightness, it can be expressed by adding the following absolute value after the color rating number;
B1=bluer
Y=yellower
D=darker
Br
If the color change is accompanied by a shift change, it can also be expressed in the following way W=weaker||tt| |Daily test rejection
S Frequently encountered
The test report should include the following contents:
This standard number GB/8423:
b) Specification of the test method
e1 When methods 1 and 2 are used for testing, if the net number of grades obtained (see 7.1 and 7.2) is different, only the lower one shall be used; l) For method 3, report the number of times the test is carried out, e) The date and place of the start and end of the test, GB/T 8429—1998
Appendix A
(Appendix A) General information on light fastness
A1 Continued Textiles are usually exposed to light during use. Light can damage the material and cause the well-known "fading" effect, which causes colored anti-color fabrics to change color, becoming lighter or darker. The light properties of dyes used in the textile industry are very important, so a method for determining their fastness is necessary. In addition, the color of the dyes will also be affected by sunlight. However, it is impossible for all parties concerned (from dye manufacturers, textile industry to anti-color fabric wholesalers and retailers and ordinary consumers) to be fully aware of this standard. Because they have not yet gained in-depth technical experience, they may also be difficult to interpret for many people who are directly interested in this standard.
A2 The following non-technical test instructions are for those who have difficulty understanding the technical details of this standard. The test method is to dry the test sample and a group of blue wool standards dyed with different degrees of color monitoring dye at the same time and under the same conditions. When the test sample has been fully dried, the sample is compared with the blue half-wool standard. If the color of the sample is similar to that of the blue half-wool standard, its light fastness is rated as 4, A. 3 These light resistance standards should cover a wide range, because some fabrics will obviously change color after 23 hours of instant exposure to strong sunlight in summer, while other fabrics may not change at all. In fact, these materials are more durable than the ones they are dyed with. There are eight labels still in use. Standard 1 is for quality assurance, and Standard 4 is for the most hypothetical light resistance. It takes a certain amount of time to achieve a certain degree of color under a certain condition. Then, to produce the same degree of color under polyester and cowhide conditions, Standard 3 will take about half the time. And Standard 5 will double the time.
A4 must be guaranteed by people who are not fashionable. When testing the same material, the material should be colored to the same degree before being evaluated against the standard wool. The final user of the fabric has a different understanding of what is a "color-changing product". Therefore, the color should be divided into two different degrees of color with the majority of people's understanding. After the color is determined by the color sample card "comparison color difference" (color sample card grade 5 equals colorless gray sample card grade 1 equals color difference). In this way, the color recovery bar can determine the color release degree. The color sheep giant standard can determine the color fastness rate grade. However, using the same grade and strict grade as the basis for the grade, this form of measurement is short-term and complex. In fact, some expected changes will occur soon, but the same limit will not be changed. These slight changes are rarely noticed under normal circumstances, but in some cases, these slight changes can become very important, as shown below: the retailer puts a piece of fabric on the fabric and puts a cardboard label with the price on it. After a day, the label is removed and a careful inspection can identify where the label has been. Because the label has slightly changed color due to the dyeing, the fabric has developed a slight discoloration after dyeing. At the same time, it is found that the color of the wool standard has reached a similar degree over the period of time: Figure 1. The light fastness of this fabric is: Grade 2, a kind of slight color change effect, is only noticed when there is an obvious boundary between the color and the medium. It often appears on the same textile. This slight color change process can be more accurate. For example, a piece of cloth is rated 72>, indicating that the 2 in brackets is a slight decrease in the hue of the blue wool standard 2. In addition, there is a commercial color fastness grade 7:
A5. There is also a color elastic change caused by light, that is, photochromism. This effect is more accurate. Now when the dye is exposed to strong light, it will quickly change color, but in the dark, it will almost return to its original color. The degree of photochromism is determined by a special test specified in B8, and is expressed by adding a grade in brackets, such as P2> refers to the photochromic effect of gray sample level 2, while the long-term color reversion is level 6, A6 is the highest. Many samples will change color after a long time: for example, yellow can become blue, and black can also become white. Whether these samples can be said to be color-changing has been a matter of debate in the past. The method used in GB/T8426 to GB/T84.30 is very clear about this point: no matter it is a color change or a hue change, the color difference of the sample is evaluated by daily measurement, and any color change is also included in the evaluation. For example, in the green sample pair, the color change of the two tones is equivalent to the blue standard 5, but one of them changes to blue first and then to white, while the other changes to blue-green first and finally to pure blue. The former should be evaluated as "3", while the latter should be evaluated as "5 blue". In this regard, the method used in GB/T8426 to GB/T84.30 is to express the changes of the sample during the drying process as comprehensively as possible without making it too complicated.The use of the wool standard can determine the degree of color fastness. However, using the same standard as the standard as the basis for the grade is a short-term test. In fact, some minor changes will occur in the same year, but the same limit will not change. These slight changes are rarely detected under the right conditions. In some cases, these slight changes become very important, as shown in the following example: a retailer puts a piece of fabric on the fabric and puts a cardboard label with the price on it. After a few days, the label is removed and a careful inspection can identify th
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