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This document specifies two methods for determining the heat resistance of patent leather. Method A makes use of a modified lastometer, while Method B uses the "Zwik" apparatus. Both methods are applicable to patent leathers for all end uses. This document (EN ISO 17232:2017) has been prepared by Technical Committee "International Union of Leather Technologists and Chemists Societies (IULTCS)" in collaboration with Technical Committee CEN/TC 289 "Leather", the secretariat of which is held by UNI (Italy). The responsible German standardization committee is Working Committee NA 062-05-51 AA "Anforderungen und physikalische Prüfverfahren für Leder und seine Ausgangsprodukte" ("Requirements and physical test methods of leather and …") of DIN Standards Committee Materials Testing (NMP).
This document replaces DIN EN ISO 17232:2009-04 .
This document has been replaced by: DIN EN ISO 17232:2026-03 .