GB/T 31127-2014Textiles - Tests for colour fastness - Colour fastness to transfer in joints (English PDF)

Foreword

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

This Standard was proposed by China National Textile and Apparel Council.

This Standard shall be under the jurisdiction of National Technical Committee 209 on Textiles of Standardization Administration of China (SAC/TC 209/SC 1).

The drafting organizations of this Standard: Shenzhen Academy of Metrology & Quality Inspection, Textile Industry Standardization Institute, China Lilang Limited, Joeone Co., Ltd.

The drafters of this Standard: Wang Xiu, Si Ying, Ye Moujin, Lin Rongzong, Ye Yuhui.

1 Scope

This Standard specifies two test methods for determining the colour fastness to transfer in joints of textiles, namely the washing method and the soaking method.

This Standard applies to all kinds of textiles that are stitched from dark and lightcolored textiles. Non-stitched textiles can implement by reference.

2 Normative references

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

GB/T 6682, Water for analytical laboratory use - Specification and test methods FZ/T 01023, Instrumental assessment of the degree of staining of adjacent fabrics

3 Principle

4 Equipment

A suitable mechanical washing device which is composed of a water bath that is equipped with a rotating shaft. The rotating shaft supports multiple stainless steel containers, of which the capacity is (550 ± 50) mL, in a radial shape; the diameter is (75 ± 5) mm; the height is (125 ± 10) mm; the distance from the center of the shaft to the bottom of the container is (45 ± 10) mm. The speed of the shaft and the container is (40 ± 2) r/min. The temperature of the water bath is controlled by a thermostat, so as to keep the test solution within the specified temperature of ± 2°C.

5 Reagents and materials

6 Sample preparation

On the two fabric samples that need to be jointed together, cut a sample of (100 ± 2) mm × (40 ± 2) mm respectively; attach the front sides of the two samples together; joint along a short side to form a combined sample. For finished products that have been jointed, in the case that the used method doesn’t affect pressure requirements of the sample, the combined samples can be cut directly at the joint.

7 Operating procedures

8 Test report

The test report shall include the following:

e) if necessary, other test temperatures that are used in the washing method;

f) staining level of the sample;