Detail of GB/T 20393-2024

Introduction of GB/T 20393-2024

General technical requirements for products with natural color cotton and mixture of natural color cotton 1 Scope This document specifies the quality requirements, inspection rules, marking requirements, etc. for products with natural color cotton and products with mixtures of natural color cotton, and also describes the corresponding test methods. This document is applicable to products with natural color cotton blended with other fibers. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method) GB/T 3920 Textiles - Tests for colour fastness - Colour fastness to rubbing GB/T 3921-2008 Textiles - Tests for colour fastness - Color fastness to washing with soap or soap and soda GB/T 3922 Textiles - Tests for colour fastness - Color fastness to perspiration GB/T 4802.1-2008 Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 1: Circular locus method GB/T 4856 Package of cotton goods and knitwear GB/T 5296.4 Instructions for use of products of consumer interest - Part 4: Textiles and apparel GB/T 5713 Textiles - Tests for colour fastness - Color fastness to water GB/T 7573 Textiles - Determination of pH of aqueous extract GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values GB/T 8427-2019 Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc GB/T 8628 Textiles - Preparation, marking and measuring of fabric specimens and garments in tests for determination of dimensional change GB/T 8629-2017 Textiles - Domestic washing and drying procedures for textile testing GB/T 8630 Textiles - Determination of dimensional change in washing and drying GB/T 17592 Textiles - Determination of the banned azo colourants GB/T 17593.1 Textiles - Determination of heavy metals - Part 1: Atomic absorption spectrophotometry GB 18401-2010 National general safety technical code for textile products GB/T 19976-2005 Textiles - Determination of bursting strength - Steel ball method GB/T 23344 Textiles - Determination of 4-aminoazobenzene GB/T 24121 Textile products - Determination of the remains of broken sewing needle GB/T 29862 Textiles - Identification of fiber content GB 31701 Safety technical code for infants and children textile products GB/T 42701 Textiles - Identification of naturally colored cottons - Chemical staining method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 natural color cotton cotton with natural color cotton fibers 3.2 products with natural color cotton fiber products with a natural color cotton fiber content of 30% or more 3.3 products with mixtures of natural color cotton fiber products with a natural color cotton fiber content of less than 30% 4 Requirements 4.1 Color difference The color difference of products with natural color cotton and products with mixtures of natural color cotton shall not be less than Grades 3-4.

Contents of GB/T 20393-2024

Contents Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 5 Test methods 6 Inspection rules 7 Instructions for use, packaging, transportation and storage 8 Others Annex A (Normative) Test method for quantitative analysis of products with natural color cotton fibres blended with white cotton