GB/T 730-2008Textiles -- Tests for colour fastness -- Quality control of Blue wool reference materials 1 to 7 (English PDF)

Foreword

This Standard uses the re-drafting method to modify and adopt ISO 105-B08.1995

Textiles - Tests for colour fastness - Part B08.Quality control of blue wool reference

materials 1 to 7 (English version).

The main differences between this Standard and ISO 105-B08.1995 are as follows.

-- Replace international standards in normative references by national standards,

add FZ/T 01047, and remove ISO 105-A01.1994 and ISO 105-B01.1994;

-- Remove the foreword of ISO 105-B08.1995;

-- Combine Appendix A and Appendix B of ISO 105-B08.1995 into Appendix

A, and adjust it from an informative appendix to a normative appendix;

-- Add Appendix B to describe blue wool reference materials and the names of

dyes of various grades;

-- Change the relevant section of conditions of use in 4.2 computers and related

software from 6.2.2 to 6.2.4;

-- Change 6.2.2 set the light fastness tester to normal blackboard temperature

and effective humidity conditions according to 6.2a) of GB/T 8427-2008 to

6.1a);

-- Add Note 4;

-- Remote Notes 4, 5, 6 and 11 of ISO 105-B08.1995.

This Standard replaces GB 730-1998 Textiles - Tests for colour fastness - Blue wool

standards for colour fastness to light and weathering. The main changes between this

standard and GB 730-1998 are as follows.

-- Change the standard name to Textiles - Tests for colour fastness - Quality

control of blue wool reference materials 1 to 7;

-- Adjust it from a mandatory standard to a recommended standard;

-- Use "blue wool reference materials" instead of "blue wool standards";

-- Use A1 to A7 in Appendix A of the previous version of the standard as the

main text;

-- In normative references, add GB/T 250, GB/T 8424.3 and FZ/T 01047, and

remove GB/T 8426, GB/T 8429 and GB/T 8430;

-- In light source box for instrument rating, add the description "see FZ/T 01047";

Textiles - Tests for colour fastness - Quality control of blue

wool reference materials 1 to 7

1 Scope

This Standard describes the quality control method for blue wool reference materials in

batches in tests on colour fastness to light and weathering of textiles.

This Standard specifies an instrumental method for assessing the dyeing uniformity of

blue wool reference materials and two methods for assessing fading performance.

visual evaluation and instrumental evaluation. The blue wool reference materials to be

tested shall be compared with the reference blue wool reference materials.

For relevant acceptance criteria and storage conditions, see Appendix A.

This Standard applies to all dyed wool fabrics used as blue wool reference materials (1

~ 7).

Note 1.This Standard does not apply to blue wool reference materials 8, because the

time required for fading from 8 to the gray scale 4 and 3 for assessing change

in colour is too long, and alternative methods are being considered for its use.

Note 2.The test method is based on GB/T 8427.This is because this method is

recognized as the most widely used test method for color fastness to light and

can represent all test methods that specify the use of blue wool reference

materials.

Note 3.For blue wool reference materials and names of dyes of various grades, see

Appendix B.

2 Normative references

The terms in the following documents become the terms of this Standard by reference

to this Standard. For dated references, all subsequent amendments (not including errata

content) or revisions do not apply to this Standard. However, parties to agreements that

are based on this Standard are encouraged to study whether the latest versions of these

documents can be used. For undated references, the latest edition applies to this

Standard.

GB/T 250, Textiles - Tests for colour fastness - Grey scale for assessing change in

colour (GB/T 250-2008, ISO 105-A02.1993, IDT)

Set the light fastness tester (4.3) to normal blackboard temperature and effective

humidity conditions according to 6.1a) of GB/T 8427-2008; operate according to 7.1 of

GB/T 8427-2008; use the humidity test-control specimen (4.6).

Place the assembled test sample in the light fastness tester and expose it until the color

difference between the exposed part and the unexposed part of the reference sample

reaches level 4 as assessed by the gray scale for assessing change in colour (4.8). This

assessment shall be performed visually by an experienced assessor in the light box for

rating (4.9).

At this time, cover the left third of the test sample and the middle part AB with another

opaque covering CD (second covering), see Figure 2b); continue to expose until the

color difference between the exposed part and the unexposed part of the reference

sample reaches level 3 as assessed by the gray scale for assessing change in colour (4.8);

then, terminate the exposure.

Note 6.For visual assessment during exposure, only one rater needs to decide when to

add the second covering and when to terminate the exposure.