GB/T 2391-2024 "Reactive Dyes—Determination of Fixation Yield" applies to the determination of the fixation yield of reactive dyes in printing and exhaust dyeing, specifying the corresponding test methods. The fixation yield for printing is calculated by comparing the absorbance values of the washing solutions from steamed and unsteamed samples, while the fixation yield for exhaust dyeing requires measuring the absorbance values of the dyeing residual liquor and standard dye solution, among others. The standard specifies instrument requirements such as spectrophotometers, dyeing machines, and steaming machines, detailing parameters including dyeing temperature, liquor ratio, time, and auxiliary dosage. It also covers operational procedures such as sample pretreatment, washing, and measurement.
| Status | Active | ||
|---|---|---|---|
| CCS | G55 | ICS | 71.100.01;87.060.10 |
| Release Date | 2024-03-15 00:00:00 | Implementation Date | 2024-10-01 00:00:00 |
