Test Method: SATRA TM36
This method is intended to determine the tendency of the top surface of a leather to wrinkle or buckle, as a result of loose fibres separating, when it is folded grain surface inwards. This phenomenon is termed break or pipiness. The method is generally only applicable to leather but can be used with certain types of coated material. The test can be carried out on uncut sheets, cut components and completed products.
A specimen is bent round a semi-circular mandrel so that its grain or outer surface is against the mandrel. The surface of the specimen is viewed through a rectangular hole in the mandrel and any buckling of its surface is graded by subjective comparison with a standard break/pipiness scale.
This Test Method does not reference any additional Standards or Test Methods.
First issued August 1967. Revised October 1970, September 1992, May 1999, July 2021.
This test method is available to members and non-members.
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