1 Scope
This standard specifies a method for determining the colour fastness and ageing properties of all kinds of textiles under the action of an artificial light source representative of natural daylight, and under the simultaneous action of heat. Of the five different sets of exposure conditions specified (see 6.1), four use D65, and the fifth a somewhat lower cut-off wavelength. The test method gives special consideration to the light and heat conditions that occur in the interior of a motor vehicle.
The five different sets of conditions specified are known to give similar but not necessarily identical results.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour (GB/T 250-2008, ISO 105-A02:1993, IDT)
GB/T 6151 Textiles - Tests for colour fastness - General principle of testing (GB/T 6151-1997, eqv ISO 105-A01:1994)
GB/T 8427 Textiles - Tests for colour fastness - Color fastness to artificial light: Xenon arc fading lamp test (GB/T 8427-2008, ISO 105-B02: 1994, MOD)
GB/T 8431 Textiles - Tests for colour fastness - Detection and assessment of photochromism (GB/T 8431-1998, eqv ISO 105-B05:1993)
FZ/T 01024 Instrumental assessment method for discoloration of specimen (FZ/T 01024-1993, neq ISO 105-A05:1992)
3 Principle
3.1 Light fastness test
A specimen is exposed to artificial light under prescribed conditions, along with a set of blue wool references. The colour fastness is assessed by comparing the change in colour of the specimen with that of the references used, or with the grey scale in accordance with GB/T 250, or by means of a colour measuring instrument in accordance with FZ/T 01024 after the specimen has been exposed to a specified amount of radiant energy.
Foreword i
1 Scope
2 Normative references
3 Principle
4 Apparatus and materials
5 Preparation of specimens and exposure card
6 Procedure
7 Assessment of colour fastness to light
8 Test report
Annex A (Normative) Exposure methods
Annex B (Normative) Apparatus for determining colour fastness and ageing with air-cooled xenon lamps
Annex C (Normative) Apparatus used for determining colour fastness and ageing with water-cooled xenon lamps
Annex D (Normative) Test method according to condition No.5
