1 Scope
This standard specifies a method for determining the behaviour of the surface of a leather on rubbing with felt.This standard is applicable to all sorts of leathers.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 250-1995 Gray scale for assessing change in colour
GB 251-1995 Gray scale for assessing staining
GB/T 6682-1992 Water for laboratory use; Specifications
QB/T 3812.2-1999 Leather-Conditioning of test pieces for physical tests
QB/T 2464.23-1999 Leather-Tests for color fastness-Colour dastness to perspiration.
FZ/T 60004-1991 Textiles-Thickness test methods for non-wovens
3. Principle
One side of the leather to be tested is rubbed with pieces of reference wool felt under a given pressure for a given number of forward and backward motions. The changes in colour of the pieces of felt and of the leather are asseseed with the grey scales. Any other visible change in or damage to the surface of leather is also reported.
Note: During the test, the felt might be colour polluted certainly as the migration of coloring matter (e.g. the color migration caused by other possible reasons of coating , pigment, fuel or dust and leather surface).
