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ISO 11640:1993 Leather -- Tests for colour fastness -- Colour fastness to cycles of to-and-fro rubbing
standard by International Organization for Standardization, 12/01/1993
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Full Description
The principle of the method specified is rubbing one side of the leather to be tested with pieces of reference wool felt under a given pressure for a given number of forward and backward motions, assessing the change in colour of the pieces of felt and of the leather with the grey scales. Any other visible change in or damage to the surface of the leather is also reported.