BS ISO 20942:2019 pdf free.Leather — Full chrome upper leather — Specification and test methods.
Introduction
Leather is widely used in the footwear industry. Although different tanning agents can be used to produce leather, chromium Ill is still the most important agent in the tanning of leather for footwear. This document specifies requirements for various types of full chrome upper leather which are used in the footwear industry.
BS ISO 20942 specifies requirements, methods of test and methods of sampling for full chrome upper leather. This document is applicable to upper leather which is used in general purpose sports footwear, school footwear, casual footwear, men’s town footwear, women’s town footwear, cold weather footwear, fashion footwear, infants’ footwear and indoor footwear.
2 Normative references
ISO 2418. Leather — Chemical, physical and mechanical and fastness tests — Sampling location ISO 2588 Leather — Sampling — Number of items for a gross sample
ISO 3376. Leather — Physical and mechanical tests — Determination of tensile strength and percentage extension
ISO 3377-2. Leather — Physical and mechanical tests — Determination of tear load — Part 2:Double edge tear
ISO 3379. Leather — Determination of distension and strength of surface (Ball burst method)
ISO 4045, Leather — Chemical tests — Determination of pH and difference figure
ISO 4048, Leather — Chemical tests — Determination of matter soluble in dichioromethane and free fatty acid content