This standard specifies the technical specifications for photographic base paper. This standard applies to photographic base paper for processing, printing and enlargement. GB 11541-1989 Photographic base paper GB11541-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Subject Content and Scope of Application
Photographic base paper
This standard specifies the technical specifications for photographic base paper. This standard is applicable to photographic base paper for processing, printing and enlargement. 2 Reference standards
GB450 Paper and paperboard sampling
GB451.1 Determination of size and deflection of paper and paperboardGB451.2 Determination of quantitative weight of paper and paperboard
GB453 Determination of tensile strength of paper and paperboard (constant rate loading method)GB465.2 Determination of tensile strength of paper and paperboard after soaking in water for a specified timeDetermination of tearing resistance of paper
Determination of water absorption of paper and paperboard (Kebo method)GB1540
Determination of whiteness of paper and paperboard
GB 8940.1
Determination of smoothness of paper and paperboard (Buick method)GB456
Determination of elasticity of paper
GB 1541
Determination of dust content of paper and paperboard
Determination of moisture content of paper and paperboard
GB 462
GB2828
Batch inspection counting sampling procedures and sampling tables (applicable to the inspection of continuous batches) GB10342 Paper packaging and marking
3 Product classification
3.1 Photographic base paper is divided into two types according to quality: U grade and A grade. U grade is used for processing high-end artistic photography printing and enlargement photographic paper. A grade is used for processing general printing and enlargement photographic paper. GB11541-89
3.2 Photographic base paper is a roll of paper with a width of 1100±3mm and a length of 1600~1700m for 140g/m2 and 1100~~1200m for 200g/m2, or as specified in the order contract.
4 Technical requirements
4.1 The technical indicators of photographic base paper must comply with the provisions of Table 1. Approved by the State Bureau of Technical Supervision on July 27, 1989, 88
Implemented on April 1, 1990
Full-width quantitative difference
Indicator name
Longitudinal tensile strength
Wet longitudinal tensile strength
Transverse tear
Water absorption (Cobb method)
Transverse stretchability
Smoothness
Developer absorption
Water permeability
0. 1~ 0. 3 mm
More than 0.3~~0.5mm
More than 0. 5 mm
Dust degree 0. 1 ~0.5mm
greater than 0.5~~1.0mm
greater than 1.0mm
delivery moisture
not less than
not less than
not less than
not less than
not less than
not less than
GB 11541-89
140±3
200±5
pieces/m2
pieces/m2
The thickness of paper should be uniform and uniform, and there should be no single-sided tightness. 4.2
completely opaque
not allowed
not allowed
specified value
4.3The cutting edge of paper should be neat and clean.
The paper surface is flat, and there are no wrinkles, wrinkles, spots, blisters, sand and other paper defects that affect the use. 4.4
4.5 The fiber structure of the paper should be uniform, the surface should be smooth and delicate, and there should be no significant difference between the front and back. 140±4
200±6
No
4.6 The internal paper defects of the roll that are not easy to find during the rewinding process, such as inconspicuous wrinkles, wrinkles, streaks, spots, blisters, etc., shall be inspected according to the provisions of 6.6 of this standard, but shall not exceed 2%. If there is any objection, the whole roll shall be rewound. 4.7 Those with one of the following conditions shall be classified as second-class products, but shall not exceed two at the same time. 4.7.1 The lateral stretchability exceeds the specified value, but is less than 3.0% (absolute value). 4.7.2 Iron spots 0.1~0.3mm2.
Exceeding the specified 100/m*.
4.7.3 Dust level 0.1~～0.5mm exceeds the specified limit but is within 80 pieces/m2. 4.8 The number of second-class products shall not exceed 2% of the delivery quantity. 5 Test methods
5.1 Quantitative and full-width quantitative difference shall be measured in accordance with GB451.2; 5.2 Longitudinal tensile strength shall be measured in accordance with GB453; 5.3 Wet longitudinal tensile strength shall be measured in accordance with GB465.2; 5.4 Transverse tearing degree shall be measured in accordance with GB455.1; 89
5.5 Water absorption shall be measured in accordance with GB1540;
5.6 Whiteness shall be measured in accordance with GB8940.1;
5.7 Transverse elasticity shall be measured in accordance with GB459: 5.8 Smoothness shall be measured in accordance with GB456;
5 .9 Water permeability shall be measured in accordance with Appendix A (Supplement); GB11541—89
5.10 The amount of developer absorbed shall be measured in accordance with Appendix B (Supplement); 5.11 Iron point shall be measured in accordance with Appendix C (Supplement); 5.12 Dust degree shall be measured in accordance with GB1541; 5.13 Delivery moisture shall be measured in accordance with GB462; 5.14 When measuring the paper defects inside the roll, select the sample roll, cut 10 layers from the outer circumference of the roll, remove the outer 5 layers, cut the remaining 5 layers into 0.05m2 paper pieces, then select the paper pieces with paper defects and weigh them, and calculate their percentage in the sample. 6 Inspection rules
6.1 One batch is a single delivery, but not more than 30 t; 6.2 The manufacturer shall ensure that the products produced meet the requirements of this standard, and a product quality certificate shall be attached to each paper when it is delivered; 6.3 Product delivery inspection sampling shall be carried out in accordance with GB2828; 6.4 The delivery acceptance unit of photographic base paper is paper; the collection of samples and the treatment of samples before inspection shall be carried out in accordance with the provisions of GB450; 6.5
The items, sequence and inspection level of delivery sampling, sampling plan and acceptable quality level (AQL) shall be as specified in Table 2. Table 2
Batch case
91~280
Normal secondary sampling, inspection level
Class B non-conforming products
Class C non-conforming products
Performance classification causing non-conforming products
Non-conforming products
Longitudinal tensile strength
Wet longitudinal tensile strength
Transverse elasticity
Developer absorption
Water absorption
Water permeability
Delivery moisture
Non-conforming products||t t||Full-width quantitative difference
Transverse tear
Smoothness
Dust
Appearance paper defects
6.7 Users have the right to check product quality according to standards. If they have any objections to the quality of paper, they should notify the manufacturer within three months after arrival (or as stipulated in the contract) for joint re-inspection, or entrust the inspection department to re-inspect. If users have objections to the appearance of paper defects, they should conduct a comprehensive inspection of the sample rolls drawn as the basis for assessment. If it does not meet the requirements of the determination number of this standard, it will be judged as a batch of unqualified products and the manufacturer will be responsible for handling it. Marking, packaging, transportation, purchase and storage
7.1 Packing and marking shall be carried out in accordance with the provisions of GB45, and the following supplementary provisions shall be made. 7.1.1 The paper roll should be rolled on a dry and hard paper core with an inner diameter of 80mm. It should not be flattened or cracked. 7.1.2 There should be no more than 2 joints per paper roll. The broken ends should be connected smoothly and firmly, and marked clearly. 7.1.3 Each paper roll must be accompanied by a card with the number, year, month, day of production, shift, rewinder, and inspector code. 7.1.4 The paper roll should be wrapped with three layers of kraft paper and one layer of plastic cloth. Both ends should be tightly wrapped. The corrugated paper should be wrapped in a chrysanthemum shape. The two ends should be tied with a round plate with the same diameter as the roll, and finally tied with a hemp rope. 90
GB11541—89
7.2 When transporting and stacking paper rolls, it is not allowed to be thrown down from a high place. It can only be dropped and placed with care. 7.3 When transporting, it should be transported in a clean covered car box. Paper should be properly stored to prevent it from being affected by wind, rain, snow or ground moisture. 7. 4
GB 11541—89
Appendix A
Determination of water permeability of photographic base paper
(Supplement)
This method refers to the uniformity of water permeability of photographic base paper after development (alkaline), fixing (acidic) and washing (neutral), expressed in grades.
A1 The sample shall be taken and processed in accordance with the provisions of GB450. A2 Test chemicals and apparatus IⅢ
A2.1D-72 (1:2) developer;
A2.2F-5 fixer;
A2.3 developer tray, fixer tray;
A2.4 stopwatch:
A2.5 washing tank;bzxz.net
A2.6 Standard sample (photo).
A3 Test process and calculation of results
Take a 120mm long full-width paper sample and cut it into four samples with a width of 280mm. Put the sample into the developer for 4 minutes, take it out and put it into the fixer. Take it out after 10 minutes, rinse it with running water, put the sample on black paper, observe its uniformity with the naked eye, and compare it with the standard sample (photo) to evaluate the grade.
Grade A - completely uniform or completely impermeable; Grade B - slightly poor uniformity of water permeability;
Grade C - seriously uneven water permeability.
Appendix B
Determination of the amount of developer absorbed by photographic base paper
(Supplement)
This standard refers to the amount of developer absorbed by photographic base paper. B1 The sample is taken and processed according to the provisions of GB450 and tested at 20±2℃. B2 Reagents
D-72 (1:2) developer
B3 Test instruments and vessels
B3.1 One-hundredth of a day balance;
B3.2 Stopwatch;
B3.3 Developer tray;
B3.4 Constant temperature controller;
B3.5 10 kg weight roller.
B4 Test procedure
B4.1 Cut four 100mm×100mm test pieces from the full-width paper sample. B4.2 Weigh the test piece on the balance and record the weight G. B4.3 Put the weighed test piece into the developer at 20±2℃, making sure that the test piece is immersed in the liquid. B4. After 42 minutes, take out the sample, put it on the filter paper, cover the paper with a piece of filter paper, and gently push the paper with a roller, back and forth once, take out the sample, weigh it quickly, and record the weight G1. 92
B5 Calculation of test results
Absorption development W is expressed in %, calculated as follows: Where: G—weight of sample before immersion in developer, g; G—weight of sample after diffusion of developer, g. The test results are expressed as the average of four paper samples. GB11541-89
× 100
Method for determination of metallic iron content in photographic base paper
(Supplement)
C1 The sample is taken and processed according to the provisions of GB450. C2 Test reagents and instruments
C2.14% chemically pure nitric acid solution;
C2.22% chemically pure potassium ferrocyanide solution;C2.3 Acid-resistant water tank;
C2.4 Stopwatch;
C2.5 Wooden clips;
C2.6 Standard dust picture.
C3 Test process and result calculation
c3.1 Cut two 100mm×100mm test pieces from the full-width paper sample and immerse them in a water tank containing a mixed solution of 4% nitric acid and 2% potassium ferrocyanide (ratio 1:1). Take them out after 10 minutes, wash with water and air dry them, check the blue spots on the paper, and calculate the points according to the standard dust picture.
C3.2 The test results are converted into 1m2 content by the arithmetic mean of the measured values ​​of the two samples. Additional notes:
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is under the jurisdiction of the Paper Industry Scientific Research Institute of the Ministry of Light Industry. This standard was drafted by Shanghai Xinfeng Copper Mesh Paper Mill and Shanghai Paper Research Institute. The main drafter of this standard is Zhang Hanzhong.
The original QB705-79 will be invalid from the date of implementation of this standard. 93
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