GB/T 24988-2020Copy paper (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 24988-2010 "Copy Paper". Compared with GB/T 24988-2010, the main technical changes of this standard as follows.

---Adjusted the regulations on quantitative deviation, thickness, stiffness, opacity, dustiness, and delivery moisture (see 5.1, 4.1 in 2010 edition);

--- Deleted the sizing degree regulations (see 4.1 in the 2010 edition);

---Added the regulation of the bob value (see 5.1);

---Adjusted the skewness requirements of copy paper (see 5.2, 4.2 of the 2010 edition);

--- Modify the internal quantity deviation requirement to the net content requirement (see 5.7, 4.1 in 2010 edition).

1 Scope

This standard specifies the classification, size, requirements, test methods, inspection rules, signs, packaging, and transportation of copy paper and copy paper base paper And storage.

This standard applies to paper and base paper used exclusively for copying graphic and text information by photocopiers, printers and fax machines.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 450 Paper and paperboard sample collection and the measurement of the vertical and horizontal directions, front and back sides of the sample

GB/T 451.1 Paper and paperboard size and skewness determination

GB/T 451.2 Determination of quantitative weight of paper and cardboard

GB/T 451.3 Determination of thickness of paper and cardboard

GB/T 456 Determination of smoothness of paper and paperboard (Buick method)

GB/T 462 Paper, paperboard and pulp analysis sample moisture determination

GB/T 1540-Determination of water absorption of paper and paperboard-Kobo method

GB/T 1541 Paper and cardboard dust determination

GB/T 1543 Paper and cardboard opacity (paper backing) determination (diffuse reflectance method)

GB/T 2828.1 Sampling inspection procedure by attributes Part 1: Batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 7974 Determination of blue light diffuse reflectance factor D65 brightness of paper, cardboard and pulp (diffuse/vertical method, outdoor daylight conditions)

GB/T 10342 Paper packaging and marking

GB/T 10739 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp samples

GB/T 22364-2018 Determination of bending stiffness of paper and cardboard

JJF1070-2005 Quantitative Package Commodity Net Content Measurement and Inspection Rules

3 Categories

3.1 Copy paper and copy paper base paper are classified into high-quality products and qualified products according to their quality.

3.2 According to the slitting method, the copy paper is flat paper, and the base paper of copy paper is divided into flat paper or roll paper.

4 Size

4.1 The size of the base paper for copy paper should conform to Table 1 or the order contract.

4.2 The size of the copy paper should meet the requirements of Table 2 or the order contract.