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GB/T 251-2008 PDF English
GB/T 251: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 251-2008 | English | 70 |
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Textiles -- Tests for colour fastness -- Grey scale for assessing staining
| Valid |
| GB 251-1995 | English | 190 |
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Gray scale for assessing staining
| Obsolete |
| GB 251-1984 | English | RFQ |
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Gray scale for assessing staining
| Obsolete |
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GB/T 251-2008: Textiles -- Tests for colour fastness -- Grey scale for assessing staining
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NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.01
W 04
GB/T 251-2008 / ISO 105-A03.1993
Replacing GB 251-1995
Textiles – Tests for Color Fastness
– Grey Scale for Assessing Staining
(ISO 105-A03.1993, IDT)
Issued on. AUGUST 06, 2008
Implemented on. JUNE 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Principle... 4
Foreword
This Standard adopts the translation method to equivalently use ISO 105-A03.1993
Textiles – Tests for Color Fastness – Part A03.Grey Scale for Assessing Staining
(English Version) and its Technical Corrigendum 2.2005.
This Standard makes the following editorial modifications.
--- Modify “this Part of ISO 105” into “this Standard”;
--- Delete the Foreword of ISO 105-A03.1993;
--- Include the contents of ISO 105-A03.1993 – Technical Corrigendum 2 in the
relevant clauses.
This Standard replaces GB 251-1995 Grey Scale for Assessing Staining. Compared
with GB 251-1993, this Standard has the major changes as follows.
--- Modify the standard name into “Textiles – Tests for Color Fastness – Grey Scale
for Assessing Staining”;
--- Adjust from the mandatory standard to recommended standard;
--- Add background and covering material color requirements when using grey scale.
This Standard was proposed by China National Textile and Apparel Council.
This Standard shall be under the jurisdiction of Foundation Subcommittee of National
Technical Committee for Standardization of Textiles (SAC/TC 209/SC 1).
Drafting organizations of this Standard. Shanghai Textile Industry of Technical
Supervision; and Shanghai Textile Research Institute.
Chief drafting staffs of this Standard. Chen Xiaocheng, Zhang Zhifeng, and Wang
Zhongzhao.
The historical editions replaced by this Standard are as follows.
--- GB 251-1964, GB 251-1984, GB 251-1995.
Textiles – Tests for Color Fastness
– Grey Scale for Assessing Staining
1 Scope
This Standard specifies the grey scale and its use method for assessing the degree of
staining of the lining fabric in the tests for color fastness of textiles. This Standard
provides an accurate color measurement interval of grey scale, which may be used as
the permanent record for the comparison of the newly produced grey scale and the
grey scale that may change.
2 Principle
If the five-grade grey scale is used, when the perceived color difference between the
original lining and the post-test lining is equivalent to the perceived color difference of
certain grade of the grey scale, then such grade shall be taken as the degree of staining
color fastness of the specimen.
be the medium grade, such as Grade 4-5 or Grade 2-3.Only when there is no
perceived color difference between the post-test lining and the original lining, can it be
assessed to be Grade 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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