GB/T 2379-2020 in English
VALIDAcid complex dyes—Determination of shade and relative strength
- Issued on:2020-12-14
- Implemented on:2021-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$97.00
《GB/T 2379-2020酸性络合染料 色光和强度的测定》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
Introduction
Analysis of the core content of the standard
| Technical elements | GB/T2379-2013 | GB/T2379-2020 | Significance of the revision |
|---|---|---|---|
| Standard name | Determination of dyeing color and intensity | Determination of color and intensity | Expand the scope of application |
| Test method | Single dyeing method | Dyeing method + solution colorimetry | Establish a dual-track verification system |
| Dye solution preparation | Special for dyeing method | Unified preparation process | Improve operation standardization |
| Result evaluation | Visual inspection only | Visual inspection +colorimeter | Enhance data objectivity |
Key technical points
1. Dyeing operation standardization
Wool dyeing needs to control: sulfuric acid concentration 5.0%-7.5%, bath ratio 1:50, boiling dyeing for 60 minutes. Nylon dyeing uses acetic acid to adjust the pH value, and the laboratory dyeing machine needs to ensure a uniform temperature rise of 30-60 minutes.
2. Innovation in solution colorimetry
Newly added spectrophotometer determination:
- The absorbance of the prepared solution is controlled at 0.3-0.7 (10mm optical path)
- The difference between parallel measurements is ≤2 points
- Calculation formula: F=(Ai×ms)/(As×mi)×100
Implementation Suggestions
Quality Control Case
A dye company used a spectrophotometer for detection and found that when the dye solution temperature exceeded 25°C, the absorbance would fluctuate by ±0.05. It is recommended to establish a constant temperature detection environment (23±1°C).
Equipment Selection Guide
| Instrument Type | Accuracy Requirements | Recommended Model |
|---|---|---|
| Analytical Balance | 0.0001g | Mettler XPR Series |
| Colorimeter | ΔE≤0.1 | Datacolor 600 |
Standard Evolution Analysis
The 1980 version first established the acid dye test framework. The main breakthroughs of the 2020 version are:
- Introducing solution colorimetry as an arbitration method
- ClearingSpectrophotometer technical parameters
- Refine the nylon dyeing temperature control point (90-95℃)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 21875-2016 in English
Dyestuffs--Determination of build up
2016-06-14 -
GB/T 36899-2018 in English
Fluorescent whitening agents—Determination of yellow spots
2018-12-28 -
GB/T 5540-2017 in English
Disperse dyes-Determination of dispersibility-Filter test of double filter papers
2017-05-31 -
GB/T 33054-2016 in English
Determination of content of sodium，sulfide in sulphur dye products
2016-10-13 -
GB/T 10663-2014 in English
Disperse dyes―Determination of migration property―High temperature dyeing process
2014-07-08 -
GB/T 7771-2008 in English
Measurement of special metamerism index - Change in illuminant
2008-09-18 -
GB/T 4464-2016 in English
Dyestuffs—Determination of migrati
2016-06-14 -
GB/T 42357-2023 in English
Water-insoluble dyes—Determination of purity—Liquid chromatography
2023-03-17 -
GB/T 27592-2023 in English
Reactive dyes—Determination of degree of fixation in pad dyeing
2023-03-17 -
GB/T 6688-2008 in English
Dyestuffs - Determination of relative strength and color difference - Instrumental method
2008-09-18
