Standard No.:	GB/T 2387-2025
English Name:	Reactive dyes—Determination of shade and relative strength
Chinese Name:	反应染料 色光和强度的测定
Chinese Classification:	G55    Basic standards and general methods for dye
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-8-29
Implemented on:	2026-3-1
Status:	to be valid
Superseding:	GB/T 2387-2013 Reactive dyes—Determination of shade and relative strength GB/T 33053-2016 Reactive dyes for wool一Determination of shade and relative strength GB/T 33788-2017 Reactive dyes -- Determination of shade and relative strength -- Low salt dyeing method
Target Language:	English
File Format:	PDF
Word Count:	9000 words
Translation Price(USD):	270.0
Delivery:	via email in 1~3 business day

GB/T 2387-2025 Reactive dyes—Determination of shade and relative strength English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered. ICS 71.100.01;87.060.10 CCS G55 NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA GB/T 2387-2025 Replacing GB/T 2387-2013, GB/T 33788-2017, GB/T 33053-2016 Reactivedyes—Determinationofshadeandrelativestrength Published on 2025-08-29 Implemented on 2026-03-01 Issued by State Administration for Market Regulation Standardization Administration of China Contents 1 Scope 2 Normative References 3 Terms and Definitions 4 Principles 5 Reagents and Materials 6 Instruments and Equipment 7 Test Methods Reactivedyes—Determinationofshadeandrelativestrength 1 Scope This document describes methods for determining shade and strength of reactive dyes. This document applies to cellulose fiber reactive dyes and wool reactive dyes for shade and strength determination. 2 Normative References The following documents' contents are indispensable clauses through normative references in this document. For dated references, only the edition corresponding to the date applies; for undated references, the latest edition (including all amendments) applies. GB/T 2374-2017 Dyes - General conditions for dyeing tests GB/T 6687 Terminology of dyes GB/T 6688-2008 Dyes - Determination of relative strength and color difference - Instrumental method 3 Terms and Definitions The terms and definitions defined in GB/T 6687 and the following apply to this document. 3.1 X-type reactive dye Reactive dye containing dichlorotriazine reactive groups in molecular structure. 3.2 K-type reactive dye Reactive dye containing monochlorotriazine reactive groups in molecular structure. 3.3 KE-type reactive dye Reactive dye containing two monochlorotriazine reactive groups in molecular structure. 3.4 KN-type reactive dye Reactive dye containing β-vinylsulfone reactive groups in molecular structure. 3.5 M-type reactive dye Reactive dye containing both monochlorotriazine and β-vinylsulfone reactive groups in molecular structure. 4 Principles The reactive dye sample and the standard sample of the same variety are dyed under the same conditions on cellulose fiber or wool. The dyeing depth of the standard sample is taken as 100 points, and the shade is used as the standard for visual comparison or instrumental measurement to evaluate the shade and strength of the sample. 5 Reagents and Materials Reagents and materials shall comply with the provisions of Chapter 3 in GB/T 2374-2017.