GB/T 22858-2025Silk books (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 22858-2009 "Silk Books". Compared with GB/T 22858-2009, the main differences are structural adjustments and editorial changes. In addition, the main technological changes are as follows:

a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.2009 edition);

b) The definition of "silk book" has been changed (see 3.1,.2009 edition 3.1);

c) The assessment items of "formaldehyde content", "odor", and "fiber content tolerance" have been added (see 4.1.2);

d) The assessment requirements for quality deviation rate, density deviation rate, and color fastness to dry rubbing have been revised (see 4.1.2,.2009 version 4.1.2);

e) The assessment requirements for appearance defects have been changed (see 4.1.3,.2009 version 4.1.3);

f) The assessment requirements for color and page layout in the finished product have been changed (see 4.2,.2009 version 4.2);

g) The tolerance for cut finished product specifications has been changed (see 4.3.1,.2009 version 4.3.1);

h) The deviation between the center line of the text or markings on the spine and the center line of the spine has been corrected (see 4.3.3,.2009 edition 4.3.3);

i) The requirements for thread sewing have been changed (see 4.4.1.2,.2009 version 4.4.1.2);

j) The requirements for book blocks, covers, and fitting have been changed (see 4.4.3,.2009 edition 4.4.3);

k) The requirements for bibliographic data and instructions for use have been changed (see 4.5,.2009 edition of 4.5);

l) The test methods for the main materials, finished product appearance, and finished product specifications have been changed (see Chapter 5, Chapter 5 of the.2009 edition);

1 Scope

GB/T 22858-2025 is the Chinese national standard on silk books, in the field of textile and leather technology. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 31 October 2025 by the State Administration for Market Regulation; Standardization Administration of China, and takes effect on 1 November 2027. Classification: ICS 59.080, CCS W43. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

2 Determination of tear strength of trouser specimens (single seam)

GB/T 3920 Textiles - Tests for color fastness - Color fastness to rubbing

GB/T 4668-1995 Determination of density of woven fabrics

GB/T 4669-2008 Textiles - Determination of mass per unit length and mass per unit area of woven fabrics

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 8427-2019 Textiles - Tests for color fastness - Color fastness to artificial light. Xenon arc

GB/T 9851.7-2008 Printing Technology Terminology Part

GB/T 2910 (all parts) Quantitative chemical analysis of textiles

GB/T 2912.1 Textiles-Determination of formaldehyde-Part

3 Terms and Definitions

The terms and definitions defined in GB/T 9851.7 and GB/T 26380, as well as the following terms and definitions, apply to this document.

7 Post-press Processing Terminology

GB/T 12451 Cataloging-in-Publication Data for Books

GB 18401 National Basic Safety Technical Specifications for Textile Products

GB/T 26380-2022 Textiles - Silk Terminology

GB/T 29862 Labelling of Fiber Content in Textiles

GB/T 30325-2013 Requirements for Hardcover Books

GB/T 30326-2013 Requirements for Paperback Books FZ/T 01057 (all parts) Test methods for identification of textile fibers