1 Scope
This standard specifies a method for the determination of distension and strength of leather grain.
This standard is applicable to all types of leathers (light leather).
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
QB/T 2706-2005 Leather — Chemical physical and mechanical and fastness tests — Sampling location (ISO 2418:2002, MOD)
QB/T 2707-2005 Leather — Physical and mechanical tests — Sample preparation and conditioning (ISO 2419:2002, MOD)
3 Principle
A steel ball is pressed against the centre of the flesh side of a circular disk of leather securely clamped round its periphery. The pressure and the distension produced are recorded at grain crack and at burst.
