Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Third Revision) which is identical to ISO 5431 : 2022 ‘Leather — Wet blue goat skins — Specification’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Leather, Tanning Materials and Allied Products Sectional Committee and approval of the Chemical Division Council

This standard was first published in 1968. During the first revision in 1987, changes were made in the requirements of pH of water extracts, shrinkage temperature and the test method for determining the fungicidal efficacy. The period for which the leathers are expected to inhibit mould growth was also specified. Further, the appendices on methods of test for moisture content, pH of water extract and shrinkage temperature were deleted and reference was made to the methods prescribed in IS 582 and

IS 5914.The second revision of the standard was carried out in 2022 to harmonize it with ISO 5431 : 2013.

ISO 5431 has subsequently been revised in 2022 and this third revision has been undertaken to adopt the latest version of ISO 5431.In this revision following modification have been done: