This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of thin relief paper. This standard is applicable to paper used for relief printing of reference books and other printing purposes. QB/T 1456-1992 Thin relief paper QB/T1456-1992 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Thin relief paper
1 Subject content and scope of application
QB/T 1456--1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of thin relief paper. This standard is applicable to printing paper such as relief printing tool books. 2 Reference standards
GB/T450 Paper and paperboard sampling
GB/T451.1 Determination of size and skewness of paper and paperboardDetermination of basis weight of paper and paperboard
GB/T 451.2
Determination of thickness of paper and paperboard
GB/T 451.3
GB/T 453
GB/T456
GB/T457
GB/T460
GB/T 462
GB/T1541
GB/T 1543
GB/T 2828wwW.bzxz.Net
Determination of tensile strength of paper and paperboard (constant rate loading method)Determination of smoothness of paper and paperboard (Buick method)Determination of folding endurance of paper
Determination of sizing degree of paper and paperboard (ink streaking method)Determination of moisture content of paper and paperboard
Determination of dust content of paper and paperboard
Determination of opacity of paper (paper backing)Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches)GB/T 8940. 1
GB/T 10342
GB/T 10739
3 Product classification
Whiteness determination method for paper and paperboard 45/0 directional reflection method Packaging and marking of paper
Pulp, paper and paperboard
Standard atmosphere for sample handling and testing
3.1 The technical quality level of thin relief paper is divided into three levels: A, B and C. 3.2 Thin relief paper is mainly flat paper.
4 Technical requirements
4.1 The technical indicators of thin relief paper must comply with the requirements of Table 1. Table 1
Indicator name
Average cutting length
Not less than
Approved by the Ministry of Light Industry of the People's Republic of China on April 14, 1992 262
0.65~0.80
0.65~0.80
Implemented on December 1, 1992
Transverse folding endurance
Indicator name
Smoothness Average of front and back
Difference between front and back
Opacity
35g/m2
40g/m2
45,48g/m2
Gluing degree
Dust degree|| tt||0.1~～1.5mm2
Greater than 1.5mm2
Delivery moisture
QB/T1456—1992
Continued Table 1
Not less than
Not less than
Not less than
Not less than
Not less than
Not more than
pieces/m2
Not allowed
Not allowed
Not allowed
4.2 Flat paper is 787mm×1092mm, 1168mm×850mm, 880mm×1230mm, the deviation is not allowed to exceed ±3mm, and the skewness is not allowed to exceed 3mm. Other specifications of paper or roll paper can also be produced according to the contract. 4.3 The fiber structure of paper should be uniform and the paper surface should be flat. 4.4 The cutting edge of paper should be neat and clean, and the color of each batch of paper should not be significantly different. 4.5 The paper surface should not have sand particles, hard blocks, wrinkles, glossy and matte streaks, spots, transparent spots and holes visible in the light, etc. Various paper defects that affect the use of paper are not allowed.
4.6 The paper should not have the phenomenon of print-through, powder loss and hair loss during printing. 5 Test method
The sample is taken according to the provisions of GB/T450. 5.1
5.2 The quantitative determination is carried out according to the provisions of GB/T451.2. 5.3
The tightness is measured according to the provisions of GB/T451.3. 5.4 The tear length is measured according to the provisions of GB/T453. 5.5 The folding endurance is measured according to the provisions of GB/T457. 5.6 The smoothness is measured according to the provisions of GB/T456. Whiteness shall be measured in accordance with the provisions of GB/T8940.1. 5.7
Opacity shall be measured in accordance with the provisions of GB/T1543. 5.8
5.9 Sizing degree shall be measured in accordance with the provisions of GB/T460, and the second line of "Paper to Ink Penetration and Diffusion Comparison Plate" shall be implemented. 5.10 Dust degree shall be measured in accordance with the provisions of GB/T1541. 5.11
Delivery moisture shall be measured in accordance with the provisions of GB/T462. 5.12 The size and skewness of paper shall be measured in accordance with the provisions of GB/T451.1. 6 Inspection rules
6.1 One delivery is considered as a batch, but not more than 30t. 6.2 The manufacturer shall ensure that the paper produced meets the requirements of this standard, and each piece of paper shall be accompanied by a product quality certificate. 263
QB/T1456--1992
6.3 The sampling inspection for delivery inspection shall be carried out in accordance with the provisions of GB/T2828. 6.4 The sample unit is the order, and the sampling plan is listed in Table 2. 6.5 The purchaser has the right to check whether the quality of the batch of products meets the requirements of this standard. If there is any objection to the quality of the products, it shall notify the supplier within three months after the arrival of the goods and jointly take samples for re-inspection. If it does not meet the requirements of this standard, the batch will be judged as unqualified and the supplier shall be responsible; if it meets the requirements of this standard, the batch will be judged as qualified and the purchaser shall be responsible.
91~500
501~1200
Normal inspection Second sampling plan Inspection level S-4 Class B nonconforming products
Sample size
13(26)
7 Marking, packaging, transportation, storage
Class C nonconforming products
Nonconforming classification
Nonconforming
Breaking length
Opacity||tt ||Unqualified
Folding endurance
Smoothness
Smoothness front and back
Sizing
Dust
Delivery moisture
7.1 The packaging and marking of thin relief paper shall be carried out in accordance with the provisions of GB/T10342, and the following supplementary provisions shall be made:7.1.1 The vertical and horizontal directions of each flat paper shall be consistent, and arrows shall be drawn on the outer skin and outer wrapping paper of the package to indicate the vertical direction of the paper. 7.2 Rainproof, moisture-proof and clean transportation tools must be used during transportation. 7.3 Paper pieces shall not be dropped from a high place during transportation. 7.4 The storage of finished products shall be strictly protected from the influence of rain, snow and ground moisture. Additional remarks:
This standard was proposed by the Paper Industry Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Paper Standardization Center. This standard was drafted by Zhejiang Longyou Paper Mill. The main drafter of this standard is Wang Zuomin.
From the date of implementation of this standard, the former Light Industry Ministry Standard QB825-1981 "Thin Letterpress Paper" shall be abolished. This standard adopts the Soviet Union National Standard rOCT7317-1978 "Thin Letterpress Paper" by reference. 264
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