Leather Test Methods For Colorfastness And Color Measurement
– Colour Fastness Leather to Light: This method can be used to determine the resistance of leather to light. The Xenon lamp emits light at a wavelength that is close to daylight. Under controlled conditions, the side of the leather sample to be tested is exposed to light from a Xenon lamp. Eight blue-dyed wool standards (blue range) are also used. By comparing the leather’s fading with that of the blues standards, the light fastness of the leather is determined. To aid in the evaluation, the fading is usually done within two exposures.
– Leather Colour Fastness to Mild Cleaning: The resistance to mild domestic washing in water and leather colour is measured by the colour fastness to hand washing. Not only can there be colour changes in leather but also coloured substances that may bleed or stain it when washing.
– Color Fastness of Leather to Wash: This refers to the resistance to washing in domestic machine laundry with water. Not only can leather color changes occur but also colored substances can bleed through the leather and stain nearby textile materials.
– Colour fastness of small samples to dry cleaning solutions: This method can only be used to determine the leather’s resistance to dry cleaning solutions. This method does not address the suitability for dry cleaning composites or leather garments.