Some standard content:
GB16797—1997
This standard is formulated on the basis of non-equivalent adoption of DIN6721 (1992). In addition to the technical indicators specified in the German standard, this standard also adds warping and friction resistance in view of the characteristics of carbonless copy paper processing. In order to reflect the performance, the color sensitivity and light resistance indicators are proposed based on a large number of test verifications. The test conditions of this standard are (23±1)℃, (50±2)%rh. Appendix A, Appendix B and Appendix C of this standard are all standard appendices; Appendix D of this standard is a prompt appendix.
This standard is proposed by China Light Industry General Association.
This standard is under the jurisdiction of the National Paper Industry Standardization Technical Committee. The drafting unit of this standard: China Pulp and Paper Industry Research Institute. The main drafters of this standard: Zhang Shaoling, Chen Shuo, Liu Jiangyi, Chen Xi, Han Xiuzhen, Wang Huajia, Sun Qiuju, Zhang Xiaohui. This standard is published for the first time.
1 Scope
National Standard of the People's Republic of China
Carbon Copy
Carbonless copy paper
This standard specifies the technical specifications of carbonless copy paper. Paper
GB 16797-1997
neq DIN 6721 Teil(1992)
This standard applies to multi-layer paper for printing or writing on force-sensitive recorders such as electronic computers; it also applies to multi-layer carbon paper for printing various bills, forms, etc.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB450-89 Paper and paperboard sampling
GB451.1-89 Determination of size and deflection of paper and paperboardGB451.2--89 Determination of basis weight of paper and paperboardGB451.3--89 Determination of thickness of paper and paperboardGB 453--89
Determination of tensile strength of paper and paperboard (constant rate loading method)Determination of smoothness of paper and paperboard (Buick method)GB456--89
Determination of moisture content of paper and paperboard
GB 462-89
GB 465. 2--89
Determination of tensile strength of paper and paperboard after soaking in water for a specified timeGB1540-89 Determination of water absorption of paper and paperboard (Cobber method)Determination of dust content of paper and paperboard
GB 1541--89
GB 1543--89
GB 2828--87
GB 7974--87
GB 7975-87
Determination of opacity of paper
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)Determination of whiteness of paper and paperboard (diffuse/vertical method)Determination of color of paper and paperboard (diffuse/vertical method)GB 10341--89
Determination of printed surface strength of paper and paperboardElectric GB10342-89
Paper packaging and marking
Standard atmosphere for handling and testing of pulp, paper and paperboard samplesGB 10739--89
GB/T 13528---92
2 Determination of pH value on the surface of paper and paperboard
3 Definitions
This standard adopts the following definitions.
3.1CB paper: colorant is coated on the back and used as the upper layer of carbonless copy paper (coated on the back). 3.2CFB paper: colorant is coated on the front and colorant is coated on the back and used as the middle layer of carbonless copy paper (coated on the front and back). 3.3CF paper: colorant is coated on the front and used as the lower layer of carbonless copy paper (coated on the front). Approved by the State Administration of Technical Supervision on May 28, 1997 254
Implementation on May 1, 1998
4 Product classification
GB16797-1997
4.1 Carbonless copy paper is mainly divided into three types: upper page paper (CB), middle page paper (CFB) and lower page paper (CF). 4.2 Carbonless copy paper is divided into black printing paper, blue printing paper, or other color printing paper according to different color rendering. 4.3 Carbonless copy paper is generally white or colored. 4.4 Carbonless copy paper is divided into ordinary type and durable type according to usage requirements, and into grade A, grade B, grade C according to its quality. 4.5 Carbonless copy paper is divided into flat paper and roll paper. 5 Technical requirements and test methods
The technical indicators of carbonless copy paper must comply with the provisions of Table 1. For other quantitative carbonless copy paper produced according to the order contract, the quantitative deviation shall be in accordance with the provisions of Table 1.
CB, CF
Quantitative deviation
Brightness (white paper)
<40g/m2
Opacity (white paper) (40～50) g/m2>50g/m2bzxz.net
CF surface smoothness
CF surface pH
Maximum warpage
Abrasion resistance AE
Color sensitivity (triplet)
Blue print color density 24h (triplet)
Durable type
Light resistance (AE retention rate) 144 h
Ordinary type
Delivery moisture
Not more than
Not less than
Not less than
Not less than
Not less than
Not more than
Not less than
Not less than
50.0~60.0
60.0～90.0
Static requirement No obvious color point||tt ||Test method
GB7974
GB1543
GB/T13528
Appendix A
Appendix B
Appendix ℃
Appendix C
Appendix C
5.2 The specifications of flat paper are 559mm×864mm, 584mm×914mm, 787mm×1092mm, or other specifications of paper can be produced according to the requirements of the order contract. The size deviation shall not exceed ±3mm, and the deflection shall not exceed 3mm. 5.3 The specifications of roll paper are: According to the provisions of the order contract, the deviation of the roll width less than 787mm shall not exceed ±3mm; the deviation of the roll width above 787mm shall not exceed ±5mm. 255
GB 16797—1997
5.4 The paper surface should be flat, smooth, clean, and evenly coated. There should be no folds, wrinkles, holes, obvious streaks, cracks, spots, coloration and other external paper defects.
5.5 The color tone of each batch of paper should not be significantly different. 5.6 The cutting edges of the paper should be neat, and the end of the roll should be flat and smooth. 5.7 The paper should not have obvious see-through, powder loss, or hair loss during printing. 5.8 Carbonless copy paper should be suitable for writing.
5.9 The tension of the paper roll should be uniform when it is rolled up. The color developer side of CF paper should face outwards, and the color-forming agent side of CB paper should face inwards. 5.10 The joint should be made on the entire width of the paper roll. The joint should not be adhered to the upper and lower layers of paper. The joint should be marked on the end of the paper roll. The number of joints allowed for each roll of paper is:
Roll length <3500m
Roll length 3500~6000m
Roll length 6000m
6 Inspection rules
2 joints;
3 joints;
4 joints.
6.1 One delivery is considered as a batch, and the delivery inspection sample unit is "order" or "roll". 6.2 The type inspection items are all the items specified in Table 1, except for the delivery moisture, which is inspected every six months. When the raw materials, formula or process are changed, type inspection is required.
6.3 The delivery inspection is carried out in accordance with GB2828, and the sampling plan, inspection level, and qualified quality level AQL are specified in Table 2. Table 2
Sampling plan
Batch, ream or roll
1~50
51~150
151~3200
6.4 Determination of qualified batches
Normal inspection Second sampling inspection level S-3 Sample size
Class B non-conforming products
Class C non-conforming products
Non-conforming classification
Non-conforming
Surface pH
Color sensitivity
Light fastness
Non-conforming
Quantitative, quantitative deviation
Join, brightness
Abrasion resistance
Color density
Opacity
Warp, smoothness
Dimensional deviation
Appearance paper defects
Delivery moisture
6.4.1 When the sampling batch size is between 1 and 150 reams or rolls, if the number of Class B non-conforming products in the batch is 0 and the number of Class C non-conforming products is less than or equal to 1, the batch is determined to be qualified.
6.4.2·When the sampling batch is between 151 and 3200 reams or rolls and the sample size is 8, if the number of Class B defectives in the batch is 0 and the number of Class C defectives is less than or equal to 3, the batch is judged to be qualified; if the number of Class C defectives is greater than 3, the batch is judged to be unqualified. 6.4.3When the sampling batch is between 151 and 3200 reams or rolls and the sample size is 16, if the number of Class B defectives in the batch is 1 and the number of Class C defectives is less than or equal to 2, the batch is judged to be qualified; if the number of Class C defectives is greater than 2, the batch is judged to be unqualified. 6.4.4When the sampling batch is between 151 and 3200 reams or rolls and the sample size is 16, if the number of Class B defectives in the batch is greater than 1 or the number of Class B defectives is 0; if the number of Class C defectives is greater than 3, the batch is judged to be unqualified. 6.5 The purchaser has the right to conduct acceptance inspection according to all or part of the technical requirements of this standard. During the inspection, the external packaging shall be checked first, and then samples shall be taken for inspection. If the inspection results do not conform to this standard, the purchaser shall notify the supplier within three months after the arrival of the goods (or as stipulated in the order contract) to jointly re-inspect. If the goods are still unqualified, they shall be judged as batch unqualified and the supplier shall be responsible for handling them. If they are qualified, the purchaser shall be responsible for handling them. 7 Marking, packaging, transportation, storage
7.1 The packaging and marking of carbonless copy paper shall be carried out in accordance with the provisions of GB/T10342. 7.2 The manufacturer shall ensure that the products produced meet the requirements of the standards. Each piece of paper shall be delivered with a product quality certificate. The packaging of carbonless copy paper shall indicate the manufacturer, production date, grade, variety, batch number, quantity, paper color, color of color, printing surface, roll width for roll paper, specification size for flat paper, and a certificate of quality. 7.3 The outer packaging of carbonless copy paper shall be moisture-proof and pressure-proof, and marked. 7.4 Flat paper shall be packaged according to variety, with 500 sheets as one ream. If required, it can be packed in corrugated paper boxes. 7.5 During the transportation of products, canopied and clean tools shall be used to prevent heavy pressure, mutual friction and impact, and prevent sun and rain. 7.6 Finished products shall not be thrown from high places.
Finished products shall be stored in a dry and ventilated room without direct sunlight to prevent the influence of rain, snow and ground moisture. 7.8 The shelf life of carbonless copy paper is 5 years under the specified conditions. 257
A1 Scope of application
GB16797--1997
Appendix A
(Appendix to the standard)
Determination of warpage of carbonless copy paper
This standard specifies the determination of warpage of carbonless copy paper, that is, the measurement method of the warpage degree of carbonless copy paper sample placed on a flat surface.
A2 Definition
Warpage: Under specified humidity and temperature conditions, place the carbonless copy paper sample on a flat surface. After the specified exposure time, the height of the edge of the paper from the flat surface. A3 Instrument
Scale: 150mm ruler, accurate to 1mm, the zero scale must be on the edge of the ruler so that the scale can stand upright at a right angle on the flat placement surface.
A4 Sample collection and preparation
A4.1 Samples shall be collected and measured in accordance with the provisions of GB450 and GB10739. A4.2 The paper surface shall be flat, without wrinkles and folds, and shall be kept away from direct sunlight. A5 Test steps
Cut 6 samples of 100mm×100mm at equal intervals along the transverse direction of the sample, mark the longitudinal direction of the sample and the front side when used and the layer type (CB, CFB and CF), place the sample in an environment of (25±3)%rh for more than 2h, and then move it into the specified humidity environment of (50±2)%rh, with three sheets facing down and the other three facing down, and expose for 2h. Use a ruler to vertically touch the flat surface to measure the height of the paper lifting off the plane. A6 Test result evaluation
The degree of specimen warpage is evaluated as follows:
The height of the specimen warping at any point, edge or corner is less than or equal to 5mm for slight warpage; medium warpage: the height of the specimen warping at any point, edge or corner is greater than 5mm and less than or equal to 10mm; severe warpage: the height of the specimen warping at any point, edge or corner is greater than 10mm and less than or equal to 20mm; severe warpage: the height of the specimen warping at any point, edge or corner is greater than 20mm. A7 Result report
Report the maximum value of the height of each group of specimens warping off the plane. If the differences between several tests of a specimen are large, the test can be repeated. And report the test results with a 95% confidence interval. 258
B1 Scope of application
GB 16797-1997
Appendix B
(Appendix to the standard)
Determination of friction resistance of carbonless copy paper
This method specifies the determination method of friction resistance (dynamic and static) of carbonless copy paper. B2 Definition
B2.1 Dynamic friction resistance: Place a color-developing paper sample under a color-developing paper (CF) sample of a specified area. Under a specified pressure, use a mechanical method to make the CF surface of the sample contact with the CB surface, and make relative movement. The dynamic friction resistance performance is evaluated by the color development of the sample. B2.2 Static friction resistance: Under the condition of no sliding but pressure control, CB and CF samples of the same area are stacked on each other to ensure that the CF surface of the two samples is in contact with the CB surface. After being placed for a specified time, the contrast between the test samples is used to indicate the degree of color development on the CF test sample.
B3 Instrument
B3.1 Friction tester: FORGRA Friction Tester. B3.2 Calibrated heavy bowl: 4kg.
B3.3 Smooth hard plastic plate: 50mmX50mm×25mm. B4 Sample collection
Sample collection shall be carried out in accordance with the provisions of GB450.
B5 Test steps
B5.1 Dynamic Friction
Cut the CB sample of specified size and place it on the grinding plate of the instrument. Use the punch provided by the instrument to cut the CF sample. Put the cut CF sample into the grinding head. Install the grinding head to ensure that the CF surface is in contact with the CB surface. Rub it 3 times under an additional pressure of 0kPa. Measure the color difference △E between the image of the color-developing area and the non-color-developing area. Repeat the above steps twice and take the average of the three measurement results. B5.2 Static Friction Resistance
Cut three CB and CF specimens each larger than 50mm×50mm, place the CB surface of one of the specimens in contact with the matching CF surface, and place it on a glass plane, then cover the smooth hard plastic plate with a test area of 50mm×50mm and a 4kg heavy bowl, keep the pressure for (30±1)s, carefully remove the heavy bowl and smooth plastic plate, observe the AE of the color-developing area and the non-color-developing area on the CF surface, and test the remaining specimens according to the above steps, using visual observation.
Appendix C
(Standard Appendix)
Determination Method of Color Density and Sensitivity of Carbonless Copy Paper and Its Color Trace Preservation Period C1 Scope of Application
This method specifies the determination method of color sensitivity value and color trace preservation period of carbonless copy paper on electric printers. 259
C2 Definition
GB16797--1997
C2.1 Color density: the density value or color difference of the color trace of carbonless copy paper after 24 hours of color development. C2.2 Color sensitivity: the percentage value of the density or color difference of the color trace of carbonless copy paper after 5 minutes of color development and the density or color difference of the color trace after 24 hours of placement.
c3 Instruments
C3.1 Chroma whiteness meter, using L'ab*1976 uniform color space, for simplicity, the following are not marked with "*". C3.2 Reflection densitometer.
C3.3 Printer: 24-pin electric printer. C3.4 Illuminance meter.
C3.5 Aging light box: the fluorescent lamp used, the distance between the lamp and the sample is about 100mm, so that the illumination on the illuminated sample surface reaches (3400±200) lx. The reference size of the light box is 900mm×600mm×600mm, or other sizes can be made according to the situation. C4 Sample collection and preparation
C4.1 Samples shall be collected in accordance with the provisions of GB450.
C4.2 The paper surface shall be flat to avoid coloring. C4.3 Indicate the paper sheet manufacturer, type (CB, CFB, CF layer), and production date. C5 Test steps
C5.1 Arrange into groups
Use the CB layer of carbonless copy paper produced by the same manufacturer, type and batch as the upper link, CFB layer as the middle link, and CF layer as the lower link. The CFB paper can be composed of one or more layers. In order to ensure that the CB, CFB and CF layers match, an "X" mark should be made on the first link. Then check the color of each CF surface in the carbonless copy paper. If there is a problem, appropriate correction should be adopted. The paper links should be stapled together for use. C5.2 Steps for color development of carbonless copy paper with an electric printer Put the paper incense on the printer, try to avoid color development before printing, adjust the printing pressure to the heaviest gear, and print out the pattern at a stable speed (see Figure C1): a rectangle with a width of not less than 32mm and a suitable length. (Solid color development)
C6 Evaluation of light fastness of color traces
C6.1 Determine the color difference AE value or color density D value between the color development point and the undeveloped point of the sample after 5 minutes of color development according to the method specified in GB7975.
C6.2 After the sample is placed naturally for 24 hours, the color difference △E between the color-developed part and the uncolor-developed part, or the color density D, is measured again, and the color sensitivity is calculated according to formula (C1):
×100% or
×100%
Wherein: △E.——the color difference between the color-developed part and the uncolor-developed part of the sample 5 minutes after color development; 260
（Cl）
GB 16797-1997
AE,——the color difference between the color-developed part and the uncolor-developed part of the color-developed sample 24 hours after color development; D.——the color density difference between the color-developed part and the uncolor-developed part of the sample 5 minutes after color development; Di-—the color density difference between the color-developed part and the uncolor-developed part of the color-developed sample 24 hours after color development. C6.3 Instrument
The distance between the lamp and the sample surface is 100mm, the illumination is (3400±200)1x, and the reference size of the light box is 900mm×600mm×500mm, see Figure C2.
(3400±200)1x
Sample table
C6.4 Expose the sample after the above determination in a fluorescent light box for 144h, determine the E value, and evaluate the light fastness according to formula (C2): AE, - AE,
X 100%
Where: △E
-The color difference between the coloring part and the non-coloring part of the sample after 24h of light aging;-The color difference between the coloring part of the coloring sample after 144h of light aging and the coloring part after 24h of light aging. AE
Appendix D
(Suggested Appendix)
Technical index of carbonless copy paper
Full-width quantitative difference
Brightness (white paper)
Opacity
Longitudinal tensile index
Longitudinal wet tensile index
CF surface smoothness
Positive and negative contrast
Not more than
Not less than
Not less than
Not less than
Not less than
Not less than
Not less than
Not less than
40.045.0)±5%
(0. 70~0. 80)±0. 03
· C2)
Test method
GB7974
GB1543
Surface pH
Surface water absorption Cobb60s
Surface strength (coated surface)
Low viscosity ink
0. 2~~1. 0 mm2
Dust degree 1.0~1.5mm2
Delivery moisture
Not less than
Not less than
Not less than
GB16797—1997
Table D1 (end)
piece/m2
Note: Quantitative indicators can also be specified in the order contract. 262
20.0±4.0
Not allowed
Test method
GB/T 13528
GB1540
GB10341
GB1541
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