Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Part 5/Sec 2) which is identical with ISO 17234-2 : 2011 ‘Leather - Chemical tests for the determination of certain azo colorants in dyed leathers - Part 2: Determination of 4-aminoazobenzene’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Leather, Tanning Material and Allied Products Sectional Committee and approval of the Chemical Division Council.

This standard, which was originally published in 1954 and subsequently revised as IS 582 : 1970 ‘Methods of chemical testing of leather (first revision)’, prescribed the methods of chemical testing for all types of leathers. The committee has decided to harmonize the methods of test prescribed in IS 582 with those prescribed in ISO/IULTCS standards. Accordingly, the committee decided to retain IS 582 and publish the harmonized/adopted test methods published by ISO/IULTCS in various parts of IS 582 as this standard is widely recognized by the Indian Leather Industry.