Some standard content:
Chemical Industry Standard of the People's Republic of China
Black and White Plastic Photo Paper
Subject Content and Scope of Application
HG2175
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking and transportation conditions of black and white plastic photo paper. This standard is applicable to black and white plastic photo paper used for copying and enlarging black and white images in various surveying and mapping and geological exploration. 2 Reference Standards
GB2923 Measurement and Expression Method of Sensitivity of Negative Film for Black and White Photography and Cinematography GB6843 Determination Method of Melting Point of Photosensitive Material Coating GB6847 Determination Method of Film Curl
GB11501 Spectral Conditions for Optical Density Measurement
ZBG80003 Determination Method of Moisture Content of Film Base 3 Product Classification
This product uses polyester base as support, and a titanium white layer is coated under the emulsion layer. Its structure is shown in Figure 1. This product is divided into two types of photo paper: loose leaf and roll according to usage requirements. Figure 1 Product structure
1-protective film layer; 2-emulsion layer; 3-bottom layer; 4-titanium dioxide layer; 5-bottom layer; 6-formaldehyde film base; 7-anti-curling layer 4 Technical requirements
4.1 Photographic performance and physical properties
The photographic performance and physical properties shall meet the indicators specified in Table 1, approved by the Ministry of Chemical Industry of the People's Republic of China on November 18, 1991
Standard application network b
Implementation on May 1, 1992
Photographic performance
Physical properties ||tt ||4.2 Size
4.2.1 Loose-leaf photo paper
Should comply with the requirements of Table 2,
180×180
240x240
500×600
4.2.2 Roll photo paper
Should comply with the requirements of Table 3,
1100×10000
1100×30000
4.3 Other performance
4.3.1 Apparent quality of photo paper
Gray fog density D.
Contrast coefficient?
Sensitivity S
HG2175-91
Maximum density Dmax
Melting point of emulsion layer, ℃
Moisture content, %
Curl
Basic size
Basic size
Limit deviation
Limit deviation
Basic size
Basic size
The surface of the photographic paper should be clean, without any defects such as peeling, drawing, streaking, bubbles, sand holes, folds and scratches. 4.3.2 White film quality
40~100
-5, +5
Limit deviation
Limit deviation
The sample is not exposed, but directly developed and fixed into a white film. The emulsion layer should not wrinkle, bubble or fall off. The white film should be free of spots, static electricity and light leakage. 4.3.3 Gray Film Quality
The sample should be free of streaks, wire drawing, static electricity and obvious density unevenness when processed into gray film. 4.4 Warranty Period
Standard Technical Question.b2so8o.cem Various Standard Industry Information Free Download HG217591
Photographic paper starts from the date of leaving the factory. Under the conditions specified in this standard for transportation, storage and use, the warranty period is one and a half years. 5 Test Methods
5.1 Determination of Photographic Performance
5.1.1 Test Conditions and Sampling
The test should be carried out at a temperature of 23±2℃ and a relative humidity of 45%~55% for other items. If there is no other provision in the standard, the test should be carried out under the above conditions. The photographic paper used for testing shall be sampled after reaching equilibrium under the above conditions. The roll photographic paper shall be sampled at a distance of more than 0.5m from the head or tail of the roll. For loose-leaf photographic paper, take any one piece of photographic paper from the smallest packaging box as a sample. Cut two pieces of the sample that are suitable for the photosensitive instrument as test specimens.
5.1.2 Shuguang
The photosensitive instrument adopts a dimming system. The dimmer shall comply with the relevant provisions of GB2923 and the warm light time shall be selected within 1/5~1/100s.
Light source color temperature: (2856±20)K,
5.1.3 Sample washing
The exposed sample shall be kept under the environmental conditions specified in 5.1.1 and started to be washed within 1~2h. The washing shall be carried out in a small drum-type washing machine (such as XT-30) using new developer and fixer. The sample washing process is as specified in Table 4, the developer formula X-2 is as specified in Table 5, and the fixer formula D-1 is as specified in Table 6. Table 4
Drug name
Distilled water (50°)
Anhydrous sodium sulfite
Miwaner
Anhydrous sodium sulfite
Hydroquinone
Anhydrous sodium carbonate
Potassium bromide
Add distilled water to
pH (20℃)
102±01
Temperature Degree, ℃
20.0±0.5
GB10550
GB11180
GB10550
GB10552
GB10556
Time, min
Photographic grade
Photographic grade
Photographic grade
Photographic grade
Chemical pure
Standard exchange network m.bueeo.com plus Working solution formula
Tap water
Tap water
1000ml
Drug name
Distilled water
Sodium thiosulfate
Steamed filling water
Anhydrous sodium sulfite
Glacial acetic acid
Potassium aluminum sulfate
Add distilled water to liquid I + liquid II to
pH(20c)
4.25±0.25
HG2175—91
G B10551
GB10550
GB10554
GB1275
Photographic grade
Photographic grade
Chemical pure
Photographic grade
Chemical pure
1000ml
5.1.4 Preparation and storage of processing fluid
When preparing the solution, various chemicals are added in the order of Table 5 and Table 6. When the previous chemical is completely dissolved, the next chemical is added. The prepared developer is stored in a sealed container and can be used after being placed at room temperature for 12 hours. However, the solution must not be used for more than 48 hours.
5.1.5 Density measurement and characteristic curve drawing
The density of the processed sample is measured using a reflection densitometer. The geometric conditions for density measurement should meet the requirements that the incident light is a circumferential beam with an angle of 40° to 50°, and the measuring light is a vertical reflected beam with an angle of less than 5°. The spectral conditions for density measurement should comply with the provisions of GB11501. The optical density of the processed sample on the measuring plate is measured, and the characteristic curve is drawn with the density value as the ordinate and the logarithm of the exposure as the abscissa, as shown in Figure 2.
Photographic characteristic curve
Standard grid m
K00mIgH
5.1.6 Calculation of photographic performance index values
5.1.6.1 Fog density
HG2175-91
It is calculated by subtracting the optical density value of the undeveloped and only fixed sample from the optical density value produced by the undeveloped sample after development and fixing.
5.1.6.2 Contrast coefficient
The contrast coefficient is the slope of the straight line of the characteristic curve and is calculated according to formula (1): y=tgo
Where: —contrast coefficient;
The angle between the extension line of the straight line of the characteristic curve and the horizontal axis. 5.1.6.3 Sensitivity
The sensitivity is calculated by taking the reciprocal of the exposure H corresponding to point M on the characteristic curve and multiplying it by 10°. The density of point M is equal to the paper base density, coating layer density, fog density (the sum of the three is called the minimum density Dml) plus 0.60. The sensitivity is calculated according to formula (2): 103
Wherein: So.6 sensitivity of photo paper;
H. Calculate the exposure corresponding to the reference density point M of the sensitivity, x·s103-the coefficient specified for calculating the sensitivity.
5.1.6.4 Maximum density
The maximum density is the density corresponding to the highest point of the characteristic curve. 5.2 Determination of physical properties
5.2.1 Determination of melting point of emulsion layer
According to the provisions of GB6843
5.2.2 Determination of moisture content of film
According to the provisions of ZBG80003,
5.2.3 Determination of curl of film
According to the provisions of GB6847
5.2.4 Determination of film size
Use a steel ruler to measure the size of boxed photo paper and the width of roll photo paper. Use a tape measure to measure the length of roll photo paper. 5.3 Other performance tests
5.3.1 Apparent quality of photographic paper
Take a piece of photographic paper from the unopened sample and visually inspect it under white light. The apparent quality of the photographic paper shall comply with the provisions of Article 4.3.1. 5.3.2 Quality of white film
Take a piece of photographic paper from the unopened sample, develop and fix it directly without exposure, and obtain a white film. Its quality shall comply with the provisions of Article 4.3.2.
5.3.3 Quality of gray film
Take a piece of photographic paper from the unopened sample, expose it to moderate and uniform sunlight, develop it to a density of 0.9 to 1.0, and visually inspect the gray film. Its quality shall comply with the provisions of Article 4.3.3.
6 Inspection rules
6.1 Factory inspection
The quality inspection department of the manufacturer shall conduct inspections according to the inspection batch and inspection frequency specified in Table 7. Only qualified products can be shipped from the factory.
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Inspection items
Photographic properties (No. 14 in Table 丨)
Emulsion layer melting point
Moisture content
Film curl
Other Other performance
6.2 Type inspection
HG2175-91bzxZ.net
Inspection batch
Each emulsion number is a batch
Each equipment has a batch of output per shift
Each axis inspection
Inspection frequency
One test per batch
One test per production spot
One test per batch
Each axis inspection
One test per batch
This product should be type inspected when any of the following conditions occur. Type inspection should include all items specified in this standard. When there are major changes in product structure, raw materials, and processes; when the product resumes production after a long period of suspension; b.
Long-term normal production should be inspected periodically; a. When the factory inspection results are significantly different from the last type inspection results. 6.3 Delivery acceptance
The acceptance by the user department is carried out in units of reels. For each reel number, 5% of the total number of boxes or rolls are sampled, but no less than one box or one item is unqualified after inspection. Then 20% of the total number of boxes or rolls of the photo paper of the reel number are sampled for a second inspection. If more than 80% of the photo paper meets the index requirements in the second inspection, the photo paper of the reel number shall be accepted. 6.4 Quality assurance clause
The user department has accepted the products in accordance with the provisions of Article 6.3. During the warranty period, the photo paper is stored and used normally under the storage conditions specified in this standard. If it is found that there are indeed manufacturing quality problems, it can be exchanged or returned after verification. 7 Packaging and marking
7.1 Product packaging must be light-proof and moisture-proof. The smallest packaging unit for loose-leaf paper is box, each box contains two bags, and each bag contains 25 sheets. When packaging, the emulsion surface of each two sheets of photographic paper faces each other, separated by a piece of neutral paper in the middle, and a piece of cardboard paper is added to the upper and lower sides of each 25 sheets, and then packed into a double-layer black paper bag, and then packed into a black plastic bag (or plastic-coated black paper bag) and heat-sealed.
Rolled photographic paper is in rolls, and the layers of photographic paper are separated by neutral paper. Each roll of photographic paper is wrapped with two layers of black paper, and then packed into a black plastic bag and heat-sealed. Each box (roll) of product should be accompanied by an instruction manual and a certificate of conformity. The packaging of each box (roll) of product should indicate the manufacturer's name, product name, specification, model, production number, and warranty date. 7.2 Each box of loose-leaf photographic paper is packed in a carton, and each roll of paper is packed in a carton. The outer box should indicate the product name, model specification, quantity, factory batch number, warranty date, volume, quality, and "moisture-proof and sun-proof", "heat-proof and shock-proof", "anti-radiation source" and other signs. 7.3 Under the illumination of a safety light, the markings on the outside of the box (roll) should be identifiable. 8 Storage and transportation
8.1 Photo paper should not be exposed to sunlight, rain, radiation or severe vibration during transportation. &2 The storage of the product should meet the following requirements: Standard according to the website wm.baboso.ccoHG2175-91
8.2.1 The temperature of the storage room should not exceed 21°C, and the relative humidity should not exceed 65%. &.2.2 The product should maintain its original packaging. The paper box for loose-leaf paper should be stored upright, and the paper box for roll paper should be stored flat. It should be at least 15 cm away from the ground and the wall. It should not be exposed to direct sunlight.
8.2.3 It should not be damaged by chemicals such as acids and alkalis, harmful gases such as hydrogen sulfide and ammonia, and radioactive substances. Additional remarks:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the First Film Factory of the Ministry of Chemical Industry. This standard was drafted by the Second Film Factory of the Ministry of Chemical Industry. The main drafters of this standard are wax.b1808000m, various standard industry recovery materials free download3 It should not be damaged by chemicals such as acids and alkalis, harmful gases such as hydrogen sulfide and ammonia, and radioactive substances. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the First Film Factory of the Ministry of Chemical Industry. This standard was drafted by the Second Film Factory of the Ministry of Chemical Industry, and the main drafters of this standard are Lei, High Strength, Standard Broadcasting Technology Network wax.b1808000m Various standards industry recovery materials free download3 It should not be damaged by chemicals such as acids and alkalis, harmful gases such as hydrogen sulfide and ammonia, and radioactive substances. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China, and this standard is under the jurisdiction of the First Film Factory of the Ministry of Chemical Industry. This standard was drafted by the Second Film Factory of the Ministry of Chemical Industry, and the main drafters of this standard are Lei, High Strength, Standard Broadcasting Technology Network wax.b1808000m Various standards industry recovery materials free download
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