This part of ISO 3377 specifies a method for determining the tear strength of leather using a single edge tear.The method is sometimes described as a trouser tear. It is applicable to all types of leather.
EN ISO 3377-1:2011 history
2011EN ISO 3377-1:2011 Leather - Physical and mechanical tests - Determination of tear load - Part 1: Single edge tear (ISO 3377-1:2011)
2002EN ISO 3377-1:2002 Leather - Physical and mechanical tests - Determination of tear load - Part 1: Single edge tear ISO 3377-1:2002