GB/T 2379-2020Acid complex dyes—Determination of shade and relative strength (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 2379-2013 "Determination of Dyeing Shade and Intensity of Acid Complex Dyes", and is consistent with GB/T 2379-2013 Compared with the editorial changes, the main technical changes are as follows:

---The standard name was revised to "Determination of Shade and Intensity of Acid Complex Dyes";

---The preparation of the dye liquor of the wool dyeing method is modified to the preparation of the dye liquor of the dyeing method (see 5.1.3, 6.2.1 of the 2013 edition);

---Revised the result evaluation (see 5.1.6, 6.4 in the 2013 edition);

---Added solution colorimetry (see 5.2).

1 Scope

This standard specifies the method for determining the shade and intensity of acid complex dyes.

This standard applies to the determination of the shade and intensity of acid complex dyes.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 2374-2017 Regulations of general conditions for dye dyeing determination

3 Reagents and materials

The reagents used should meet the requirements of Chapter 3 in GB/T 2374-2017.

4 Apparatus and equipment

The equipment used should comply with the provisions of Chapter 4 in GB/T 2374-2017. The main instruments and equipment required are as follows:

a) Analytical balance. accuracy 0.0001g;

b) Dyeing machine for laboratory;

c) Color measuring instrument;

d) Spectrophotometer.

5 Test method