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Leather Test Methods For Colorfastness and Color Measurement

The discolored results of numerous machine washings and the Early fading of manufacturing textiles are indications of a lack of quality. This is why color fastness tests are gaining international meaning. There are a quantity of test methods systematically used for colour fastness and for dyes. The more significant are:

– Grey Scale for Assessing Change in Colour: This Grey Scale is for assessing changes in colour of leather in colour fastness tests, for example, wash fastness, perspiration fastness, etc. The scale consists of nine pairs of grey colour chips all representing a visual difference and contrast. gester instruments textile testing instruments textile testing equipment manufacturers

– Grey Scale for Assessing Staining: This Grey Scale is for assessing the degree of staining caused by a dyed leather in colour fastness tests. For example, the staining of wool and cotton fabrics in the wash fastness, perspiration fastness, etc. The scale consists of nine pairs of grey colour chips each representing a visual difference and contrast.

– Colour Fastness of Leather to Light: This method is intended for determining the resistance of the colour of leather to the action of a standard artificial light source. The Xenon lamp has an emission wavelength profile close to daylight. The side to be tested of the leather sample is exposed to light from a Xenon Lamp, under controlled conditions, along with eight blue dyed wool standards (blue scale). The light fastness is assessed by comparing the fading of the leather with the fading of the blue standards. The fading is typically made in 2 exposure times to better assist the evaluation.

– Colour Fastness of Leather to Mild Washing: Fastness of the colour of leather to hand washing is the resistance to washing under mild domestic laundering in water. In washing leather, not only changes in colour can
Occur in the leather, but coloured substances may bleed from it and may stain adjacent textile materials.

– Colour Fastness of Leather to Machine Washing: Fastness of the colour of leather to machine washing is the resistance to washing under domestic machine laundering in water. In washing leather, not only changes in colour can occur in the leather, but coloured substances may bleed from it and may stain adjacent textile materials.

– Colour Fastness of Small Samples to Dry Cleaning Solutions: This method is intended only for determining the resistance of the colour and the finish of leather to dry cleaning solutions. It does not cover the suitability of composites or complete leather garments to dry cleaning processes.

 

 

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