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GB/T 250-2008 Translated English Textiles—Tests for colour fastness—Grey scale for assessing change in colour

GB/T 250-2008 Translated English Textiles—Tests for colour fastness—Grey scale for assessing change in colour

 Standard No.: GB/T 250-2008
English Name: Textiles—Tests for colour fastness—Grey scale for assessing change in colour
Chinese Name: 纺织品 色牢度试验 评定变色用灰色样卡
Issued by: AQSIQ and SAC
Issued on: 2008-08-06
Implemented on: 2009-6-1
Language: English
File Format: PDF
Delivery: Immediate delivery

 1 Scope

 This Standard describes the grey scale for determining changes in color of textiles in color fastness tests, and its use. A precise colorimetric specification of the scale is given as a permanent record against which newly prepared working standards and standards that may have changed can be compared.

 2 Principle

 2.1 The essential, or 5-step, scale consists of five pairs of non-glossy grey color chips (or swatches of grey cloth), which illustrate the perceived color differences corresponding to fastness ratings 5, 4, 3, 2 and 1. This essential scale may be augmented by the provision of similar chips or swatches illustrating the perceived color differences corresponding to the half-step fastness ratings 4-5, 3-4, 2-3 and 1-2, such scales being termed 9-step scales. The first member of each pair is neutral grey in color and the second member of the pair illustrating fastness rating 5 is identical with the first member. 
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> The above standard is Readily Available in English. Immediate delivery after receiving payment.
> Purchase Process:
Inquiry - Quotation/Profoma Invoice - Send Sample Pages - Immediate Delivery after Payment.
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Please contact chinaautoregs@gmail.com or sales@chinaautoregs.com for the Complete English Translated Version of Chinese Standard in PDF/WORD Format.

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