GB/T 2378-2025 English PDFUS$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 2378-2025: Acid dyes - Determination of shade and relative strength Status: Valid GB/T 2378: Historical versions
Basic dataStandard ID: GB/T 2378-2025 (GB/T2378-2025)Description (Translated English): Acid dyes - Determination of shade and relative strength Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G55 Classification of International Standard: 71.100.01; 87.060.10 Word Count Estimation: 10,163 Date of Issue: 2025-08-29 Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 2378-2012, GB/T 33421-2016 Issuing agency(ies): State Administration for Market Regulation, National Standardization Administration GB/T 2378-2025: Acid dyes - Determination of shade and relative strength---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2378-2025ICS 71.100.01;87.060.10 CCSG55 National Standard of the People's Republic of China Replaces GB/T 2378-2012, GB/T 33421-2016 Determination of colorimetry and intensity of acid dyes Released on August 29, 2025 Implementation on March 1, 2026 State Administration for Market Regulation The National Standardization Administration issued PrefaceThis 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 replaces GB/T 2378-2012 “Acid dyes - Determination of color and strength” and GB/T 33421-2016 “Liquid Acid dyes - Determination of color and intensity. This document is based on GB/T 2378-2012 and integrates the content of GB/T 33421-2016. Compared with GB/T 2378-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application of this document has been changed (see Chapter 1, Chapter 1 of the.2012 edition); b) Added a chapter on terms and definitions (see Chapter 3); c) Added the principle and test method of solution colorimetry (see 4.2 and 7.2); d) The dyebath formula for nylon dyeing has been changed (see 7.1.2.3, 6.2.3 of the.2012 edition). 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 the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Standardization of Dyes (SAC/TC134). This document was drafted by. Jinhua Shuanghong Chemical Co., Ltd., Shenyang Shenyang Institute of Chemical Technology Testing Technology Co., Ltd., Shenyang Institute of Chemical Technology Co., Ltd. Co., Ltd., Chuanhua Zhilian Co., Ltd., and Shenhua Testing Technology (Nantong) Co., Ltd. The main drafters of this document are. Zheng Weiliang, Yang Zhenmei, Li Jingyi, Xu Liang, Zhao Ting, and Tao Shuaijiang. The previous versions of this document and the documents it replaces are as follows. ---First issued as GB/T 2378-1980 in 1980, first revised in.2003, second revised in.2012; --- This is the third revision and incorporates the content of GB/T 33421-2016 “Liquid acid dyes - Determination of shade and intensity”. Determination of colorimetry and intensity of acid dyes1 ScopeThis document describes methods for the determination of the shade and intensity of acid dyes by staining and solution colorimetry. This document applies to the determination of the color and intensity of acid dyes. The dyeing method is applicable to acid dyes used to dye textiles. The color method is suitable for acid dyes with higher purity or used in daily chemicals.2 Normative referencesThe contents of the following documents constitute the 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 2374-2017 General conditions for determination of dye staining GB/T 6687 Terminology of dyes3 Terms and DefinitionsThe terms and definitions defined in GB/T 6687 apply to this document.4 Principles4.1 Staining method Use the acid dye sample and the standard sample of the same type to dye on appropriate fibers (wool, nylon) under the same conditions. Take the color intensity of the standard sample as 100 points and the color as the standard, and make a visual comparison to evaluate the color and intensity of the sample. Measure the color and then calculate the color and intensity of the sample. 4.2 Solution colorimetry When the dye solution complies with the Lambert-Beer law, the acid dye sample and the standard sample are diluted with water and measured with a spectrophotometer. The intensity of the dye sample can be calculated by determining the absorbance value at the maximum absorption wavelength. The color of the sample can be evaluated by comparing the color difference between the standard sample and the test sample.5 Reagents and MaterialsReagents and materials should comply with the relevant provisions of Chapter 3 of GB/T 2374-2017.6 Instruments and EquipmentInstruments and equipment should comply with the relevant provisions of Chapter 4 of GB/T 2374-2017. ...... |
