Test method for Leather Friction Color Fastness Tester

The machine 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 Method

When testing, place the Leather Friction Color Fastness Tester 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 the instrument to fix the sample clip.

1.2 Wrap the friction pad on the rubbing head tightly and fix the rubbing pad in the spring groove of the rubbing pad.

1.3 Return the rubbing head with friction pad wrapped back to the machine frame.

1.4 Stat the machine for 25 reciprocating movement and stop to take out the friction pad.

1.5 Rate the color transferred from the leather sample to the friction pad with a gray scale. Visually assess the color rating. The light source used for assessing is the natural light from the window towards the north.

2. Wet Friction

The operation is the same as the procedure above with a wet soaked friction pad.

2.1 The friction time is 20

2.2 The friction pad is soaked with distilled water. The wet content is 70%-75%, weighted by a balance.

2.3 The wet friction pad shall place in the shade area under normal humidity air condition for natural drying. Then rate the color with gray scale.

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