IS 578 : 2023/ISO 20942 : 2019 Leather - Full Chrome Upper Leather - Specification - Methods of Test
NATIONAL FOREWORD
This Indian Standard (Fourth Revision) which is identical with ISO 20942 : 2019 'Leather tanning materials and allied products issued by 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 had been approved by the Chemical Division Council.
This document outlines the specifications, test procedures, and sample techniques for full chrome upper leather. This document applies to upper leather used in general-purpose sports shoes, school shoes, casual shoes, men's and women's town shoes, cold-weather shoes, fashionable shoes, infants' shoes, and indoor shoes.
IS 578 was originally published in 1954. The standard was subsequently revised in 1964, 1971 and 1985. During the third revision, in consideration of the needs of the export market, the maximum permitted level of chromium oxide was raised from 3.0 percent to 3.5 percent. It was also decided to replace the requirement of elongation at break with tensile elongation at a specified tension. This revision has been undertaken to harmonize with the latest ISO standard ISO 20942: 2019.
The major changes in this revision are:
a) Normative references updated;
b) Chemical requirement updated; and
c) Title of standard aligned with the ISO title.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'document' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker in the International Standard, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.