GB/T 7568.1-2002Textiles -- Tests for colour fastness -- Specification for wool adjacent fabric (English PDF)

Foreword

GB/T 7568 is divided into 7 parts:

- Specification for wool adjacent fabric;

- Specification for cotton and viscose standard adjacent fabric;

- Specification for polyamide standard adjacent fabric;

- Specification for polyester adjacent fabric;

- Specification for acrylic adjacent fabric;

- Specification for silk adjacent fabric;

- Specification for multi-fiber standard adjacent fabric.

This part is the part 1 of GB/T 7768. It modifies and uses the ISO 105-F01:2001

Textiles - Tests for color fastness - Part F01: Specification for wool adjacent

fabric (English version).

This part replaces the GB 7566-1987 Textiles - Tests for color fastness -

Specification for wool standard adjacent fabric: Wool, because the original

standard is technically obsolete due to international development.

This part was redrafted in accordance with ISO 105-F01:2001. According to

international standard and the actual conditions of Chinese national standards,

this part had made technical revisions when using the international standards.

The revisions are as follows:

In the "Normative reference" of the international standard, it cites ISO 105-J01.

In this part, it changes it into the reference to the Chinese standard GB/T 8424.2

which is corresponding to ISO 105-J02:1997.

For ease of use, this part has made the following editorial changes:

a) CHANGE the word "this part of ISO" into this part;

b) USE a decimal point "." To replace the comma "," which functions as a

decimal point;

c) DELETE the foreword to international standards.

As compared with GB 7564-1987, the main changes in this part are as follows:

- CHANGE the evaluation index of the staining performance of the adjacent

fabric into: Change the staining of the cotton-stained reference fabric in the

Textiles - Tests for color fastness -

Specification for wool adjacent fabric

1 Scope

This part specifies an undyed wool adjacent fabric suitable for use in assessing

staining in color fastness tests. The staining characteristics of the wool adjacent

fabric to be tested shall be compared with the standard wool adjacent fabric for

evaluation, which shall be carried out by two pieces of wool-stained and one

piece of cotton-stained reference fabric. All the reference fabrics shall be

obtained from the prescribed supply.

2 Normative references

The provisions in following documents become the provisions of this part

through reference in this part of GB/T 7568. For the dated references, the

subsequent amendments (excluding corrections) or revisions do not apply to

this part; however, parties who reach an agreement based on this part are

encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB 250 Gray scale for assessing change in color (GB 250-1995, idt ISO

105-A02:1993)

GB 251 Gray scale for assessing staining (GB 251-1995, idt ISO 105-

A02:1993)

GB/T 3921.2 Textiles - Tests for color fastness - Color fastness to wishing:

Test 2 (GB/T 3921.2-1997, eqv ISO 105-C02:1989)

GB/T 4669 Textiles - Woven fabrics - Determination of mass per unit length

and mass per unit area (GB/T 4669-1995, eqv ISO 3801:1977)

GB/T 5713 Textiles-Tests for color fastness - Color fastness to water (GB/T

5713-1997, eqv ISO 105-E01:1994)

GB/T 8424.2 Textiles - Tests for color fastness - Instrumental assessment of

relative whiteness (GB/T 8424.2-2001, eqv ISO 105-J-02:1997)

GB/T 7568.2 Textiles - Tests for color fastness - Standard adjacent fabrics -

The yellowness of the adjacent fabric G = 25 ± 2, which is calculated according

to the formula (1):

Where: G - The yellowness of specimen.

X10, Y10, Z10 - Tristimulus value of specimen.

The pH value of the water extract shall be 7.5 ± 0.5 when measured according

to GB/T 7573.

The mass ratio of soluble substance of dichloromethane as measured

according to the method as specified in FZ/T 20018 shall be (0.5 ± 0.1)%.

The mass ratio of alkaline solubility as measured according to the method as

specified in GB/T 7571 shall be not more than 18%.

5 Evaluation of staining performance of tested wool

adjacent fabric