Colour fastness of leather to water spotting

摘要

The colour fastness of leather to water spotting is the resistance to the action of water drops on dyed leather surfaces. A sample of leather has 2 water drops placed on the surface. One drop is dried after 30 minutes with absorbent paper and the other left for 16 hours. The change of colour of the leather is evaluated using the change of colour Grey Scale. Any other changes to the leather surface should be noted.