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GB/T 42211-2022Reinforcement method for the cotton net consolidation of decayed, fragile newspaper or periodical (English PDF)

糟朽、脆弱报纸或期刊棉网修复加固方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 30, 2022

Implementation date

July 1, 2023

Scope

GB/T 42211-2022 is the English-translated version of 糟朽、脆弱报纸或期刊棉网修复加固方法.

GB/T 42211-2022 sets out how a decayed, brittle newspaper or periodical is repaired and strengthened with a cotton net.

It covers the principle of cotton mesh reinforcement and of deacidification, the working principles of splicing, strength recovery, reversibility, compatibility, keeping the original appearance and durability, the reagents and materials, the preparation of the reinforcing net, the paper acidity test and the reinforcement process and steps, and the quality requirements for acidity, mechanical strength, colour difference and clarity, with a normative annex on preparing the water-soluble adhesive, weaving, spraying and cutting the net.

Clause 1 extends it to other double-sided text archives. Among the standards it quotes are GB/T 13528-2015 for the surface pH of paper and GB/T 6682-2008 for laboratory water. Issued on 30 December 2022, it has applied since 1 July 2023.

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Document preview — GB/T 42211-2022

National Standard of the People's Republic of China

ICS
01.140.20
Classification
A 14

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

  • Preface
  • Introduction
  • 1 Scope
  • 2 Normative references
  • 3 Terms and Definitions
  • 4 Principle
  • 4.1 Cotton mesh reinforcement
  • 4.2 Deacidification
  • 5 Repair and reinforcement principles
  • 5.1 Splicing restoration
  • 5.2 Recovery Strength
  • 5.3 Reversibility
  • 5.4 Compatibility
  • 5.5 Keep the original appearance
  • 5.6 Enhanced Durability
  • 6 Reagents and materials
  • 7 Preparation method of reinforced cotton net
  • 8 Reinforcement method for decayed and fragile newspaper or periodical cotton web
  • 8.1 Paper acidity test
  • 8.2 Repair and reinforcement process
  • 8.3 Repair and reinforcement step
  • 9 Quality requirements
  • 9.1 Acidity
  • 9.2 Mechanical strength
  • 9.3 Color difference
  • 9.4 Clarity
  • Appendix A (Normative) Preparation Method of Reinforced Cotton Net
  • A.1 Preparation of water-soluble adhesive
  • A.2 Weaving netting
  • A.3 Spray net
  • A.4 Cutting

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

Introduction

Some newspapers from the late Qing Dynasty, the Republic of my country, and the early days of the founding of the People's Republic of China are collected by archives, libraries, memorial halls, museums, etc.

Periodicals and other double-sided files have suffered serious diseases such as acidification, decay, fragility, damage, and slag, and are in an endangered state. They cannot be read and digitalized normally.

It needs to be repaired and protected urgently. On September 13, 2013, by "an environmentally friendly, low-cost cotton fiber screen reinforcement method for fragile paper (specialized Patent No..201410174645.7)" and "A flattening and fixing platform for paper screen reinforcement (Patent No. ZL201320542680.0)" The scientific research results of "repair and reinforcement and deacidification of pure cotton nets for double-sided archives such as bad and fragile newspapers or periodicals" formed by combination of technologies can repair and strengthen acid double-sided archives such as newspapers or periodicals that are chemicalized, decayed, fragile, damaged, or slag-dropped, so as to restore their strength, restore their original appearance, remove hidden dangers of acid, and enhance their durability. permanence. With the support of this scientific research achievement, relevant units have implemented a number of endangered newspapers, periodicals and other double-sided word archives restoration and protection projects. This article The document is summarized and compiled on the basis of the scientific research results and engineering practice. Restoring and protecting endangered newspapers, periodicals and other double-sided characters for relevant institutions across the country Archives provide a technical approach.

This document mainly stipulates the technical specifications for the repair and reinforcement of double-sided archives such as newspapers and periodicals.

The issuing organization of this document reminds that when declaring compliance with this document, it may involve Chapter 7, Chapter 8 and "an environmentally friendly, low-cost Method for strengthening fragile paper with cotton fiber screen (Patent No..201410174645.7)" and "A flattening and fixing platform for paper screen reinforcement (Patent No. ZL201320542680.0)" related patents.

The issuing authority of this document has no position regarding the veracity, validity and scope of this patent.

The patent holder has committed to the issuing authority of this document that he is willing to cooperate with any applicant on reasonable and non-discriminatory terms and conditions Next, negotiate the licensing of patents. The patent holder's statement is on file with the agency that issued this document. Relevant information can be obtained through the Get in touch with.

Please note that in addition to the above patents, some content of this document may still involve patents. The issuer of this document is not responsible for identifying patents responsibility.

1 Scope

This document specifies the technical methods for repairing and strengthening battered and fragile newspaper or periodical cotton webs.

This document is applicable to the salvage restoration and reinforcement of decayed and fragile newspapers or periodicals, as well as the restoration and reinforcement of other double-sided text files.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 1914-2017 Chemical Analysis Filter Paper

GB/T 4894-2009 Information and Documentation Terminology

GB/T 6682-2008 Analytical laboratory water specifications and test methods

GB/T 13528-2015 Determination of surface pH of paper and board

GB/T 32004-2015 Requirements and tests for durability and durability of writing, printing and copying on information and literature paper method

3 Terms and Definitions

The following terms and definitions defined in GB/T 4894-2009 and GB/T 32004-2015 apply to this document.

3.1 Newspaper

A serial publication that is published at frequent intervals and provides up-to-date information on current events, often with commentary. [Source: GB/T 4894-2009, 4.2.4.15]

3.2 Periodical

Serial publications aimed at a specific topic or specialized audience. [Source: GB/T 4894-2009, 4.2.4.13]

3.3 Handwriting image

Pigment applied to paper in the form of characters or other visually recognizable images. [Source: GB/T 32004-2015, 3.5, modified]

3.4 Fragile paper

Due to the gradual degradation of cellulose, the mechanical strength is reduced, the paper becomes yellow and brittle, and is easy to tear.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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