GB/T 2391-2024 in English
VALIDReactive dyes—Determination of degree of fixation
- Issued on:2024-03-15
- Implemented on:2024-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$146.00
《GB/T 2391-2024反应染料 固色率的测定》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
1. Background and significance of standard revision
The GB/T 2391 series of standards has been revised and improved since its first release in 1980. The latest version GB/T 2391-2024 replaces the 2014 version, mainly optimizing key links such as dyeing conditions, washing methods and dye bath preparation.
2. Comparison of standard frameworks
| Standard version | Main revisions | Scope of application |
|---|---|---|
| GB/T 2391—2014 | Old version of dyeing bath ratio, washing regulations, etc. | Determination of fixation rate of reactive dyes |
| GB/T 2391—2024 | Adjust dyeing bath ratio and optimize pretreatment steps | Printing and exhaust dyeing process |
3. Detailed explanation of standard determination methods
3.1 Determination of fixation rate of printing
Printing was performed according to the provisions of GB/T2387-2013. Samples A and B were prepared and washed separately. The absorbance was measured by spectrophotometer to calculate the fixation rate:
3.2 Determination of dyeing fixation rate
According to the dye type (X type, K type, etc.), the color absorption temperature, fixation time and auxiliary agent dosage were determined, and the absorbance value was measured after preparing the standard dye solution and the residual liquid.
Application case
Take M type dye as an example. At the color absorption temperature of 60℃, 20g/L anhydrous sodium carbonate was added as an alkali agent after dyeing for 90 minutes. The absorbance value of the standard dye solution and the residual liquid was measured at the maximum absorption wavelength using a spectrophotometer.
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