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GB/T 7568.2-2008 PDF English

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GB/T 7568.2-2008: Textiles -- Tests for colour fastness -- Standard adjacent fabrics -- Part 2: Cotton and viscose
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivery	Name of Chinese Standard	Status
GB/T 7568.2-2008	English	70	Add to Cart	0-9 seconds. Auto-delivery	Textiles -- Tests for colour fastness -- Standard adjacent fabrics -- Part 2: Cotton and viscose	Valid

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GB/T 7568.3 GB/T 7568.1 GB/T 7568.4 GB/T 7573

GB/T 7568.2-2008: Textiles -- Tests for colour fastness -- Standard adjacent fabrics -- Part 2: Cotton and viscose

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.080.01 W 04 Replacing GB 7565-1987 Textiles - Tests for color fastness - Standard adjacent fabrics - Part 2.Cotton and viscose Issued on. AUGUST 06, 2008 Implemented on. JUNE 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee.

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Materials... 6 4 Specifications of adjacent fabrics... 6 5 Evaluation of staining properties of cotton and viscose fiber adjacent fabrics to be tested... 7

Foreword

GB/T 7568 “Textiles - Tests for color fastness - Standard adjacent fabric” consists of seven parts. - Part 1.Specification for wool adjacent fabric; - Part 2.Cotton and viscose; - Part 3.Polyamide; - Part 4.Specification for polyester adjacent fabric; - Part 5.Specification for acrylic adjacent fabric; - Part 6.Specification for silk adjacent fabric; - Part 7.Multifibre. This Part is Part 2 of GB/T 7568. This Part referred to ISO/DIS 105-F02.2008 “Textiles -- Tests for color fastness -- Part F02.Specification for cotton and viscose adjacent fabrics” (English version). It is a revision to GB 7565-1987 “Textiles - Tests for color fastness - Specification for STANDARD adjacent fabric - Cotton and viscose”. This Part replaces GB 7565-1987 “Textiles - Tests for color fastness - Specification for STANDARD adjacent fabric - Cotton and viscose”. Compared with GB 7565-1987, the main changes in this Part are as follows. - modified the name as “Textiles - Tests for color fastness - Standard adjacent fabrics - Part 2.Cotton and viscose”; - modified it from mandatory standard to recommended standard; - added GB/T 250, GB/T 4669, GB/T 7573, GB/T 8424.1, GB/T 8424.2, FZ/T 01023 and FZ/T 01024 in normative references, deleted GB/T 6151; - deleted the principle; - when making a cotton dyed base fabric, the dye dyed was changed from "Direct Blue 1" to "Direct Blue 71"; - the mass per unit area of cotton adjacent fabric was changed from "(105±5) g/m2" to "(115±10) g/m2"; - used spectrophotometric colorimeter instead of reflective whiteness meter to determine the whiteness; the whiteness values of cotton fabrics and viscose fabrics were changed from "70±5" to "Y10=89±2; W10=80±3; Tw,10=-1±1" and "Y10=85±5.0; W10=75±6.0; Tw,10=-1±1.2”, and added requirements for the number of folded layers in the fabric; - the staining performance index of the adjacent fabrics was changed from “the stain of the base adjacent fabric and the testing adjacent fabric, the difference of the number of stages shall be no more than half level” to “the color difference shall be no less than level 4~5”; and added that using the instrumental rating method to perform the evaluation of stained adjacent fabric and base adjacent fabric after staining; - deleted the content of production of cotton, viscose adjacent fabrics and dyed base fabrics. This Part was proposed by China Textile Industry Association. This Part shall be under the jurisdiction of Subcommittee on Base of National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 209/SC 1). The drafting organization of this Part. Shanghai Textile Industry Technical Supervision Office. Main drafters of this Part. Chen Xiaocheng, Zhang Zhifeng. Version of standard substituted by this Part is. - GB 7565-1987. Textiles - Tests for color fastness – Standard adjacent fabrics - Part 2.Cotton and viscose

1 Scope

This Part of GB/T 7568 specifies the specification and requirements for the evaluation of stained undyed cotton and viscose standard adjacent fabrics in textile color fastness tests. The staining properties of the cotton and viscose fiber adjacent fabrics are determined by comparison with cotton and viscose fiber adjacent fabrics with cotton dyed base fabrics.

2 Normative references

The following standards contain the provisions which, through reference in this Part of GB/T 7568, constitute the provisions of this Part. For dated references, subsequent amendments (excluding corrections) or revisions do not apply to this Part. However, the parties who enter into agreement based on this Part are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Part. GB/T 250, Gray scale for assessing change in color (GB/T 250-2008, ISO 105-A02.1993, IDT) GB/T 251, Gray scale for assessing staining (GB/T 251-2008, ISO 105- A03.1993, IDT) GB/T 3921-2008, Textiles - Tests for color fastness - Color fastness to washing with soap or soap and soda (ISO 105-C10.2006, MOD) GB/T 4669, Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area (GB/T 4669-2008, ISO 3801.1977, MOD) GB/T 7573, Textiles - Determination of pH of aqueous extract (GB/T 7573- 2002, ISO 3071.1980, MOD)

3 Materials

3.1 Cotton testing adjacent fabric, meeting the requirements of 4.1. 3.2 Cotton base adjacent fabric, meeting the requirements of 4.1. 3.3 Cotton dyed base fabric, meeting the requirements of 4.1 and using C.I. Direct Blue 71 to dye.

4 Specifications of adjacent fabrics

4.1 Specifications of cotton adjacent fabrics 4.1.1 Mass per unit area. (115±10) g/m2, measured according to GB/T 4669. 4.2 Specifications of viscose fiber adjacent fabric 4.2.1 Mass per unit area. (140±5) g/m2, determined according to GB/T 4669. 4.2.2 Whiteness values. 4.1.3 Water extract pH. 7.0±0.5, determined according to GB/T 7573.

5 Evaluation of staining properties of cotton and

viscose fiber adjacent fabrics to be tested 5.1 General The results of the adjacent fabric in the color fastness test shall be reproducible. The most important performance is the standard staining performance. When tested with a cotton-dyed reference fabric, the cotton testing adjacent fabric shall have the same staining properties as the cotton base adjacent fabric. When tested with a cotton-dyed reference fabric, the viscose fiber to be tested shall have a staining performance consistent with the viscose fiber base fabric. 5.2 Test procedures 5.2.1 Test procedures for cotton adjacent fabrics to be tested Place a piece of cotton dyed base fabric (3.3) between a piece of cotton adjacent fabric (3.1) and a piece of cotton adjacent fabric (3.2). In order to eliminate the possible differences in the test conditions, the cotton adjacent fabric and the cotton base adjacent fabric shall be in the same combination sample. The combined sample is tested according to A (1) in GB/T 3921-2008. 5.3 Staining performance requirements The cotton testing adjacent fabric and the cotton base adjacent fabric after staining are evaluated using the gray scale card for assessing discoloration specified in GB/T 250 or the instrument rating method for the degree of discoloration of the specimen specified by FZ/T 01024.The color difference shall be no less than Level 4~5. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.

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Step 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
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