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GB/T 45707-2025: Leather - Crust full chrome upper leather - Specifications
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 45707-2025	English	299	Add to Cart	3 days [Need to translate]	Leather - Crust full chrome upper leather - Specifications

GB/T 45707-2025: Leather - Crust full chrome upper leather - Specifications

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ICS 59.140.30 CCSY46 National Standard of the People's Republic of China Specification for crust leather for chrome-tanned shoe uppers Released on 2025-05-30 2025-12-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

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. This document is modified to adopt ISO 20940.2021 "Specification and test methods for crust leather for chrome-tanned shoe uppers". Compared with ISO 20940.2021, this document has many structural adjustments. Comparison table of structural number changes between the two documents See Appendix A. This document has many technical differences compared to ISO 20940.2021. A single line (|) is used to indicate these technical differences. A list of these technical differences and their reasons is given in Appendix B. The following editorial changes were made to this document. --- To coordinate with the existing standard, the name of the standard is changed to "Specification for Crust Leather for Chrome Tanned Shoe Uppers". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Light Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Leather Industry (SAC/TC252). This document was drafted by. Xingye Leather Technology Co., Ltd., Fujian Yongjian Leather Technology Co., Ltd., Qihe Lihou Chemical Co., Ltd., China Leather and Shoe Research Institute Co., Ltd., Dongguan Zhongbiao Technology Co., Ltd., China Light Industry Inspection and Certification Co., Ltd., China Light Industry Inspection Certification (Jinan) Co., Ltd. The main drafters of this document are. Ren Keshuai, Sun Huiyong, Chen Qingfeng, Wang Shunping, Wen Huitao, Zheng Fengqiong, Feng Lianxiang, Gao Ya, Shi Weilin. Specification for crust leather for chrome-tanned shoe uppers

1 Scope

This document specifies the requirements for chrome tanned crust leather for shoe uppers, gives a product classification to facilitate technical regulations and describes the corresponding test methods. The law stipulates the classification, inspection rules and marking, packaging, transportation, storage and other aspects. This document applies to the production, inspection, grading and acceptance of all types of crust leather for chrome tanned shoe uppers.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 17928 Physical and mechanical tests for leather - Determination of pinhole tear strength (GB/T 17928-2023, ISO 23910. 2019,MOD) GB/T 19941.1 Determination of formaldehyde content in leather and fur Part 1.High performance liquid chromatography method (GB/T 19941.1- 2019,ISO 17226-1.2018,MOD) GB/T 19941.2 Determination of formaldehyde content in leather and fur Part 2.Spectrophotometric method (GB/T 19941.2--- 2019,ISO 17226-2.2018,MOD) GB/T 19942 Chemical tests on leather and fur - Determination of banned azo dyes (GB/T 19942-2019, ISO 17234-1. 2015,MOD) GB/T 22807 Chemical tests on leather and fur - Determination of hexavalent chromium content. Spectrophotometric method (GB/T 22807-2019, ISO 17075-1.2017, MOD) GB/T 22808 Chemical tests on leather and fur - Determination of chlorophenols (GB/T 22808-2021, ISO 17070. 2015,MOD) GB/T 38402 Chemical tests on leather and fur - Determination of hexavalent chromium content. Chromatographic method (GB/T 38402-2019, ISO 17075-2.2017,MOD) GB/T 39369 Physical and mechanical tests on leather - Determination of water vapor permeability (GB/T 39369-2020, ISO 14268.2012, MOD) GB/T 40920 Leather color fastness test reciprocating rubbing color fastness (GB/T 40920-2021, ISO 11640.2018, MOD) GB/T 45613 Physical and mechanical tests on leather - Determination of hygroscopicity (GB/T 45613-2025, ISO 17229.2016, MOD) GB/T 45711.2 Determination of tearing force of leather. Double-sided tearing (GB/T 45711.2-2025, ISO 3377-2.2016, MOD) QB/T 2262 Leather Industry Terminology QB/T 2710 Physical and mechanical tests on leather - Determination of tensile strength and elongation QB/T 2712 Physical and mechanical tests for leather - Determination of grain strength and extension height. Ball break test QB/T 2713 Determination of shrinkage temperature of leather in physical and mechanical tests QB/T 2714 Physical and mechanical tests on leather - Determination of folding fastness ...