GB/T 8426-1998 Textiles - Tests for colour fastness - Colour fastness to light: Daylight
Some standard content:
ICS 59. 080. 30
National Standard of the People's Republic of China
GB/T 8426--8427—1998
CB/T8429--84311998
GB/T 8433~-8441—1998
Textiles
Colour fastness tests
Textiles-Tests for colour fastness1998- 11- 26 Issued
19990501 Implementation
State Administration of Quality Supervision, Inspection and Quarantine
GB/T8426—1998
A standard is revised from GB/T81261987 according to ISO 26040SBGI, Part 1 of Textiles' Chromatic Rate Tests BO1, Colour fastness to light: Daylight. The revised text is equivalent to ISO 1U5B31:1994. This revision makes the following changes to GB/8426133: 1. According to the revision notice of GB/T 1.1-1993 and 1SS5.1.1, the size and the format of the number have been changed, and the former and the former of IS have been added,
2. In the test methods 1 and 2, when the initial response is measured, a special test is added to check whether the sample has a negative light change. 3 In the test method, "method 31 and the original method 3 and its transmission noise are added". 4. The length of the single em is changed to nm,
5, the range of the optical efficiency of the glass used for the drying rack is increased, and the thickness of the heat exchanger is specified, 6. The contents of the test report are as follows:
3 The national color wool standard 2~1S.
3. Added Appendix A (recommended for the appendix) and Appendix (recommended for the appendix). This standard is based on the actual items of the standard CB3423-1987 proposed by the China Federation of Trade Unions.
This standard is issued by the National New Product Standardization Technical Committee and its Basic Standards Branch. This standard was jointly drafted by the Standardization Research Institute of the Central Textile Association, the North Wool Textile Science and Technology Research Institute, the Shanghai Textile Industry Technical Supervisor, and the Shanghai Wool and Hemp Textile Science and Technology Research Institute. The main authors of this standard are: Ji Zhisi, Li Chun, Zhang Qiban, Zhuan Jun, Ximin, Li Xinchong, and Li Ma. This standard was first issued in 1957 and first revised in 1998. GB/T B426—1998
ISO) (International Organization for Standardization) is an international federation of international standards organizations (ISCI members). The preparation of international standards is usually carried out by ISO technical committees. Members have the right to contact the committee if they have opinions on the subject already established by the technical committee. Official and non-official international organizations can also contact ISO and participate in the work. ISO is in close contact with the International Electrotechnical Commission (IEC) on all matters related to electrotechnical standardization. Draft international standards adopted by the technical committees are voted on and published as international standards by the above-mentioned parties. Use international standards 1S0105-B01 [S0/T38/SC1 Technical Changes in Products Committee, Subcommittee on Testing of Colored Textiles and Dyes]
This fifth edition has been technically revised and cancels and replaces the fourth edition (TSO15-B01:1989). [5010: 13 parts have been published in January 1975, each part is represented by a letter (such as A\ bottle part), and the edition is from 1935 to 1975. Each part consists of a series of "abbreviations", each of which belongs to ten corresponding parts and is indicated by two independent series numbers (such as "A01\ part", these parts are now published in parts and their original "part\ letter headers remain unchanged. ISO1AUI gives the full list. ISOIS appendix A and appendix B are informative appendices. 1 Scope National Standard of the People's Republic of China Textiles-Test for colour fastness-Colour fastness to light This standard specifies the method for determining the colour fastness of textiles. This standard is applicable to all kinds of textile products. 2 Referenced standards GB/TB426-1998 ISO1D5-B01.1994 GL/T842G--1987 The following standards contain clauses that constitute the text of this standard by reference. The versions shown are valid at the time of publication. All standards are subject to revision and parties using this standard should investigate the possibility of using the latest version of the following standards. GB250-1SS5 Grey sample for evaluating discoloration (ITS0105-A02:1S93) CB7301598 Test for color flatness of textile products - Light and air fastness - Blue wool standard GB/T6151-1997 General rules for color fastness test of textile products (EQVIS0105-AC:1921) GB/9431-1998 Test for color fidelity of anti-identification products - Inspection and evaluation of photochromic change (EQ15S0105-B05:1993) 3 Principle
The sample is exposed to light together with eight blue wool standards under specified conditions without being drenched. Then the sample is compared with the eight blue wool standards to evaluate their color fastness to light. 4 Standard materials and equipment
4.1 Standard materials
The two groups of blue single wool samples mentioned in this standard can be used interchangeably, but the results obtained are not interchangeable. 4.1.1 Blue wool is 1~≤, in accordance with GB30. 4.1.2 Colored wool is 1.2~1.9; the blue wool standards developed and produced in China are numbered 2~9, with a letter before the number: these eight blue single wool standards are wool dyed with CI Mordam Blue 1 (Dye Index-Plate 133) and wool dyed with CT SrlulililVal13:8 (Material Index, 1st edition, 73801> The single wool of the central package is specially made of different mixtures, and each higher number has a light fastness of about one color higher than the lower number:
The number of B represents the corresponding relationship between each color wool standard and a certain amount of radiation energy under noise. 4.2 Equipmentbzxz.net
4.2.1 Drying should be carried out under three-dimensional sunlight in the south of the northern hemisphere and in the north of the southern hemisphere, with an inclination approximately equal to the latitude of the place. The drying rack should be set up in residential and non-industrial areas, with no dust barriers and car leather tables. The drying rack should be placed in a position to ensure that the shadow of any object on the rack does not fall on the textile being dried. The structure of the drying rack requires that the sample be sealed with glass to ensure that the sample is not affected by rain and other climatic factors. After the sample is placed, the surface must have appropriate wind resistance. The minimum thickness of the board used is 3mm, without bubbles and impurities. The light should be within 90% of the CTE lighting range, between 38cm~-75cm. The allowable distance between the sample and the sample is 511 to prevent the shadow caused by the change of the light blocking angle. 4.2.2 Shading material, for non-glare materials, such as elastic aluminum 1 or chain box thick disassembly calculation. If the dotted sample is a dotted fabric, use a and can avoid the purple sample surface shading potential.
4.2.3 Assess the color change of the charcoal sample to meet B25 (. 4.2.4 If necessary, the engineer can collect and measure the most meteorological data in the box and the surrounding area. The data obtained can be used as part of the test results to indicate the special strip material inside the sample rack. These can only record the temperature of the panel under the same angle as the test details, the total radiant energy and the lack of external radiant energy (whether it is a belt or a case belt) and the relative humidity of the air. To represent the characteristic conditions outside the sample rack, these instruments can record the environmental surface (daily high and morning data), relative (monthly high and effective weather), rainfall hours (rain) and total exposure (frost and width):
5 Samples
5.1 For method (6.1). The sample size shall not be less than 1(m×60u. For method 6.2), the sample size shall not be less than 19m1Gm1: This × year a dry wine part shall not be less than T1mm×20mra5.1.1 Fabric: tightly attached to the chain card 1.
5.1.7 The fine thread is tightly wound on 1 card and made into parallel and fixed ten cards.5.1.3 Dare to align the fibers, extrude and arrange them into 5 layers and fix them on the hard card. 5.2 For the convenience of testing, the specimen and the standard specimen of the same size may be fixed on a hard surface and arranged as shown in Figure 1 or (see 6.1 or 6.2)
5.3 The size and shape of the sample should be the same as the blue wool standard to avoid the error of the small area of blood wool when visually evaluating the noise and rice parts. Or the standard 4 standard 5 T.6 standard or 1.9 standard GB/T8426-1998 standard 2 attack L: standard 31.4 standard 5 T.e standard H standard B-nest language. At Xx, it can be formed into a leaf so that it can be rotated from AB to A'R at the same time. At XX, it can be folded into a leaf so that it can be replaced and reset on the cup belt.
CD-second construction plate
Figure 1 Method 1 Installation
6 Purification method
First proof of five;
ET-three-step retreat
break 22 by Figure
The test details are blue sheep standard and should be exposed to sunlight according to the conditions specified in 4.2.1. Every 24 hours, in the whole or after the test, the sample and 4 sheep return to the standard are difficult. After a certain period of time, the light resistance of the sample is evaluated against the corresponding blue sheep sub-standard. The five operating methods are as follows,
6.1 is an alternative 1
6.1.1. This method is considered to be satisfactory and is used when there is no dispute in the rating. The basic feature of this test is to control the exposure cycle by checking the sample. Therefore, the first test piece in the test needs to be equipped with a blue wool lifting device. E.1.2 Arrange the samples as shown in Figure 1, and place the tracer A1 alternately on the middle half of the sheet sample and the blue wool standard, and then carry out exposure under the conditions specified in 4.2.1. From time to time, lift AB to check the illumination effect of the sample until the color difference between the thick and thin parts of the sample is smaller than the second color sample card level, then cover the sample and the second half of the blue wool standard. At this stage, attention should be paid to the possibility of photochromism (see GB/84). 6.1.3 Continue to test until the color difference between the thick and thin parts of the sample reaches level 3 on the color sample card. 6.1.4 If the color ratio of the blue wool standard sample reaches level 4 on the color sample card, this method is stopped. This is because, when testing the color fastness of blue wool with a light fastness of "7" or ".7", it takes a long time to recognize the color difference of gray sample card 3-5
GB/T8426-1998
. Furthermore, when the required light fastness is level 1.9, such a color difference cannot be obtained. Therefore, when the color difference of the blue wool standard 7 taken from T.7 reaches level 4 on the gray sample card, it can be evaluated within the range of blue wool standard 7 to B double L? L9, because the time required to achieve this color difference is long enough to isolate any low errors that may be caused by the requirements. 6.2 Summary 2
6.2.1 This method is suitable for large vertical test samples: its basic characteristics are to control the exposure period only by checking the blue wool standard A set of blue wool standards is required to conduct retrograde tests on a batch of samples from time to time, thereby saving materials for the color fastness test. 6.2.2 The finished samples and blue wool standards are arranged as shown in 4.2.2. AB is a sparse material, and the trace of the sample and the color fastness test wool-L standard is carried out under the conditions specified in 4.2.2. AB should be lifted regularly to check the lighting effect of the color fastness test wool standard. When the color change degree of blue wool standard 2 reaches the color sample level 3 and the color change degree of blue wool standard 2 reaches the color sample level 4, compare the color change on the blue wool standards 1, 2.5 and 1.2, and evaluate the light fastness of the test (this is the initial evaluation of light fastness). At this stage, the possibility of color fastness should be widened. GBT Appendix 3) 6.2.3 Put the lifted cover A back to its original position accurately: continue to explode 6.2.4 Continue to place two objects C1> on the blue sheep tongue standard 4 or 1. The color change reaches the gray sample card 4. Then, place the last object EF on the blue sheep tongue standard 4 or 1. The color change reaches the gray sample card 1. Then, place the last object EF on the blue sheep tongue standard 4 or 1. The color change reaches the gray sample card 1. 6.2.5 The color change of the blue sheep non-standard or L? reaches gray + 4: 1n) The color change of the light sample reaches the gray level. 6.3 The method is applicable to the calibration and effectiveness of various performance specifications. The sample can be calculated based on the blue half-wool standard silicon. One piece is the blue single wool standard as the minimum allowable car bottom. The other piece is a piece of Lower color monitoring standard: continue to blast until the color difference between the last blue standard sample reaches 4 levels (one stage and 3 levels (one stage!). 6.4 Method 4
This method is suitable for checking whether an agreed number of samples are met. It is allowed that the sample is only exposed together with the sample until the color change of the sample reaches the required level and/or 3.
6.5 Method 5
This method is applicable to the verification of compliance with an approved vehicle. It is allowed to expose the sample alone or together with the blue standard until the color change reaches the specified level. 7.B Evaluation is. Evaluation of light fastness
7.1 When the color difference between the exposed and technical exposed parts of the sample reaches 4 levels and/or 3 levels below the gray sample, the final evaluation of light fastness is made.
7.2, remove all the fastness, the sample and the blue wool standard shall be tested for three sub-sections, some of which shall be repeated for multiple times, and at least one of them shall be not detected: the color difference between the sample and the standard shall be shown in the appropriate visual indication (see line B 65).
The lightfastness of the test is the number of the blue wool label at which the color change is apparent (the visual color difference between the sample and the end of the film). If the change shown by the sample is not one of the corresponding color wool labels, and is closer to their average value, an intermediate level shall be given, such as 3~4 or [2~13]. If different error levels are obtained for the color difference 1 at different stages, the arithmetic mean is taken as the color fastness of the sample. When the arithmetic mean is one quarter or three quarters, the adjacent high half or average should be evaluated. In order to avoid the risk of photosensitivity changes in the sample and the color fastness to the test result, the sample should be placed in a room and gradually cooled before the test (see GB/T 131). 7.3 The color of the sample should be compared with the standard blue electric wool 1 or 2. The sample should be rated as level 1 cable, GB/T84261998
7.4 Compare the color change of the sample and the color change of the standard sheep, use a neutral gray color between the color sample card level 1 and 2 to evaluate the color change, and use the sample to cover the constant speed of the sample. The aperture of the sample is fixed according to the standard. 7.5 If the light fastness is equal to or higher than the color fastness of the wool cup 4 or L3 based on the color maintenance of the color card 4-5, the initial evaluation ( 5.2.2) is very important. If the initial evaluation is level 3 or L2, it should be included in the brackets. For example, the evaluation is 6 (3) to indicate that when the color of the sample is monitored in the test, the color difference is similar to that of the blue standard 6.
7.6 If the test column is not light-sensitive, the light fastness evaluation is given in brackets. Write the teachings obtained in the photochromic test in the brackets, for example, 6 (P3-) (see B/T8431).7.7 The term "discoloration" includes changes in hue, chroma, color, or any combination of these color characteristics (see GB25). The color saturation of method 5 (see 1.5) is evaluated by comparing the sample with a gray scale or by comparing the sample with the color change of the color standard. 8 Test report
The test report should include the following contents:
) The number of this standard is G/T 6426-1998, and the year of the test.
) The test results are as follows:
Method 2: Report the light rate and the number of the wool. You can use the following two methods: 1) Display it as a single number (when using the wool standard 1--8): 2) Prefix the number with ". " (when using the wool standard 2-1.3. If the grade is equal to or higher than L3 and the initial evaluation number is lower than 3 or L2, the latter should be reported in brackets. The blood sample has light color change, and the color rate wool number is written in brackets first, and then the light color change number of the gray sample card is filled in. Milk 6 (Ps-4)
) Method 3 Formula 4.Report "qualified" or "unqualified", and report the reference sample or blue wool standard used, e) Method 5, report the color fastness to light, and can be in one of the following ways: 1) Single trace is expressed in numbers (when blue wool standard 1~8 is used); 2) The letter L is placed before the letter (when blue wool standard L2 is used); 3) If the color standard is not used, the gray sample is used for comparison and evaluation, 4) The instrument, method, exposure record and elastic record used. GB/T 8426-1998
Appendix 4
(Suggestive Appendix)
General description of color fastness to light
A1 Fabrics are usually exposed to the light when in use. The lightfastness of dyes varies widely, and some method of determining their lightfastness is necessary. In addition, sensitive substances can also affect the lightfastness of dyes. This standard cannot possibly satisfy all interested parties (from dye manufacturers and textile industry to textile wholesalers and retailers and general consumers), as they have some technical requirements. Moreover, it is not only difficult for many people directly using the standard to understand:
42 The following non-technical test instructions are prepared for those who find it difficult to understand the technical details of this standard. The test method is to test the fabric with a group of different materials of the blue wool standard under the same conditions at room temperature. When the fabric sample has fully colored, it is compared with the blue wool standard. If the color is the same, the color is measured. Similar, its light fastness rate is rated as level 4, which should include a very wide range of uses. Some fabrics can show color after 2-3 hours of slow exposure to strong sunlight in heavy season, while some fabrics can withstand years of exposure without fading. In fact, these dyes are more durable than the fabrics they are dyed from. The blue wool standard 1 is the slowest to fade, and the blue wool standard 8 is the most light-resistant. If the color of the wool standard 4 is produced, a certain amount of time is needed to achieve the degree of fading. Under such conditions, the time required for the single color to fade is only about half the time of the blue wool standard 3 + the time of the blue wool standard 5. A4 It is necessary to ensure that different people test the same material and make the material color to the same degree before making an assessment: due to the fact that the final users of color-resistant fabrics have very different understandings of what is a "packaged product", it is necessary to make the test sample color into different degrees of color, including the opinions of the purchaser, so that the assessment is more reliable. The color degree mentioned here must be determined by referring to a set of standard gray samples ["color difference is increased by comparing the color difference (Eastern color sample card 5 class light color, 1 class light color), so that the gray color degree can be determined. However, the blue wool standard can be used to assess the light fastness of velvet, but the rule of using medium and certified colors as the basis for rating is its own. In actual work Some fabric samples do change slightly after a short exposure to the sun, but they will not change after a long time. These changes are not noticeable under normal use, but in certain situations these slight changes become significant, as shown in the following example: a parts manufacturer places a piece of fabric on a shelf and places a cardboard label with a price on it. The label is then removed and a careful inspection will reveal where the label was placed because the fabric has changed slightly due to the use of the label. This dense fabric has a slight color change after exposure to the sun, and it is found that the color label has tarnished to a certain extent, so the lightfastness of this fabric is level 7. The two most important factors for checking the color of this fabric are that it can only be seen after exposure to the sun. It is only when there is a clear line of difference between the unstained parts that the sample is considered normal, and these are the ones that need to be minimized in the textile industry. This slight discoloration can be used as a rating in the following examples, such as a sample of fabric rated 7 (2). In the example above, the rating is 7 (2). The rating is 7 (2). The rating is 3 (3). In addition, there is a high light resistance rating of 7 (45). There is also an unusual color change, namely the photosensitive color change. This effect is manifested in that when the material is exposed to strong light, it will change color quickly, and then when it is transferred to a slightly different place, it will almost completely return to the original color. The degree of color change is determined by a special test specified in GB 9131. See P in the following examples. The grade is expressed, such as 5 (P2) means the light effect color change number should be single ten color sample card 2, and the water level is equal to the color plate color standard iA6. After the development, there are still some factors that can change over time, such as the color can turn brown, the forbidden color can turn blue. Can these fabrics be said to be color-avoiding? There have been many debates in the past: "This point has been very accurate in GB/T8426 to (1/TA130). Whether it is a single color or a color, the color of the fabric is not determined in detail. Any color change is included in the fabric evaluation. For example, when studying the two colors, the color change of the two colors in the sun is equivalent to the color of the color standard 3, S
GDT 8426—1998
But one of them changes to green first and then to city color, while the other changes to green first and then to color. The former should be rated as "good" and the latter should be rated as "5". In the comparison, the new method used in 13/T8426 (11/item 8433) should be used to measure the changes of the fabric samples in the slow drying process as completely as possible without making it too complicated. (Attached with tips)
Blue sheep standard 1.2~L9 corresponding light values 1 Table B1
Fading half wool standard
The color change of the blue label is based on the slow drying of 426 nmJ/0/nm
2! The wind speed should be adjusted according to the total effective value, and the light is 300~400 zurtkm
27 545
55 296
115592The blue wool standard can be used to assess the lightfastness of wool, but the rule of using medium and high colors as the basis for rating is a rule of thumb. In practice, some fabrics do change slightly after a short exposure, but they no longer change after a long time. These changes are not noticeable in normal use, but in certain circumstances this change becomes very important, as shown in the following example: a parts manufacturer places a piece of wool on a shelf and puts a cardboard label with a price on it. After removing the label, a careful inspection will reveal the place where the label was placed, because the fabric has changed slightly due to the use of the label. This piece of wool has a slight color change after being exposed to the sun, and it is found that the color of the wool label has changed to a certain extent, so the lightfastness rate of this piece is level 7. This is done by checking the color of the two elements, only when there is a clear line of difference between the parts, and these are necessary to make the cut less out of specification. This slight change of color can be used as a kind of idle woman's assessment, such as a piece of fabric with a rating of 7 (2). Indicates the number of rubbings? In addition, there is a high light resistance, and there is an unusual color change, that is, the photosensitive color change effect. This effect is manifested in that when the material is exposed to strong light, it will change color quickly, and then when it is transferred to a slightly different place, it will almost completely return to the original color. The degree of color change is determined by the special test specified in GB/T 9131, and the letter P is used in brackets to indicate the secondary number, such as 5 (P2) means the light effect color change number should be single color sample card level 2, and the water level is equal to the color. After the standard iA6 is developed, there are still many reasons for the long-term testing, and the color changes, such as the color can become brown, the forbidden color can become blue. Can these fabrics be said to be color-avoiding? There have been many debates in the past: "The standards adopted in GB/T8426 to (1/TA130 are very accurate. Whether it is a single color or a color change, the color of the fabric must be determined in detail. Any color change is included in the fabric evaluation. For example, when studying the two colors, the color change parts of the two colors are equivalent to the color of the standard 3. S
GDT 8426—1998
But one of them changes to green first and then to mountain color, while the other changes to green first and then to color, the former should be rated as "good" and the latter should be rated as "5", in the comparison, 13/T8426 rate (: 11/item 8433) the new method used in the test week in the fabric sample in the slow drying process as completely as possible to show the changes in the requirements, without making it too complicated. (Note)
Blue sheep standard 1.2~L9 light corresponding value 1 Table B1
Fading half wool standard
The color change of the blue label is based on the special 4 slow increase 426 nmJ/0/nm
2! The wind number should be the whole endurance, the total effective value is calculated, the light 300~·400 zurtkm
27 545
55 296
115592The blue wool standard can be used to assess the lightfastness of wool, but the rule of using medium and high colors as the basis for rating is a rule of thumb. In practice, some fabrics do change slightly after a short exposure, but they no longer change after a long time. These changes are not noticeable in normal use, but in certain circumstances this change becomes very important, as shown in the following example: a parts manufacturer places a piece of wool on a shelf and puts a cardboard label with a price on it. After removing the label, a careful inspection will reveal the place where the label was placed, because the fabric has changed slightly due to the use of the label. This piece of wool has a slight color change after being exposed to the sun, and it is found that the color of the wool label has changed to a certain extent, so the lightfastness rate of this piece is level 7. This is done by checking the color of the two elements, only when there is a clear line of difference between the parts, and these are necessary to make the cut less out of specification. This slight change of color can be used as a kind of idle woman's assessment, such as a piece of fabric with a rating of 7 (2). Indicates the number of rubbings? In addition, there is a high light resistance, and there is an unusual color change, that is, the photosensitive color change effect. This effect is manifested in that when the material is exposed to strong light, it will change color quickly, and then when it is transferred to a slightly different place, it will almost completely return to the original color. The degree of color change is determined by the special test specified in GB/T 9131, and the letter P is used in brackets to indicate the secondary number, such as 5 (P2) means the light effect color change number should be single color sample card level 2, and the water level is equal to the color. After the standard iA6 is developed, there are still many reasons for the long-term testing, and the color changes, such as the color can become brown, the forbidden color can become blue. Can these fabrics be said to be color-avoiding? There have been many debates in the past: "The standards adopted in GB/T8426 to (1/TA130 are very accurate. Whether it is a single color or a color change, the color of the fabric must be determined in detail. Any color change is included in the fabric evaluation. For example, when studying the two colors, the color change parts of the two colors are equivalent to the color of the standard 3. S
GDT 8426—1998
But one of them changes to green first and then to mountain color, while the other changes to green first and then to color, the former should be rated as "good" and the latter should be rated as "5", in the comparison, 13/T8426 rate (: 11/item 8433) the new method used in the test week in the fabric sample in the slow drying process as completely as possible to show the changes in the demand, without making it too complicated. (Prompt attachment)
Blue sheep standard 1.2~L9 light corresponding value 1 Table B1
Fading half wool standard
The color change of blue label is based on the special 4 slow increase 426 nmJ/0/nm
2! The wind number should be the whole endurance, the total effective value is calculated, the light 300~·400 zurtkm
27 545
55 296
115592
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.