Leather Friction Color Fastness Tester is designed to carry out a rub fastness test on the surface of leather or coated fabrics to determine the marring of the surface finish and to assess the amount of color transfer from the sample to the rubbing pad under dry friction and wet friction. Testing Principle of Leather Friction Color Fastness Tester : The rubbing pad under certain load of pressure makes reciprocating friction against the leather surface to assess the amount of color transfer red from the leather surface to the rubbing pad . Visually assess the color rating with gray scale. Testing steps for Leather Friction Color Fastness Tester : When testing, place the instrument on the felt. 1. Dry Friction 1.1 The used side of the sample faces upward, stretched in the sample holder without wrinkles. Tighten the sample clip and place it between the long hole and felt in the base of the instrument . Use the screw of the long hole in the base of t