NATIONAL FOREWORD

This Indian Standard (Part 2) (Second Revision) which is identical with ISO 4802-1 : 2016 ‘Glassware — Hydrolytic resistance of the interior surfaces of glass containers — Part 1: Determination by titration method and classification’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation(s) of the Glass, Glassware and Laboratoryware Sectional Committee and approval of the Chemical Division Council.

This standard was originally published in 1963 and subsequently revised in 1994.The second revision of this standard has been undertaken to align it the latest version of ISO 4802-1.

The hydrolytic resistance is measured by titration of a known aliquot portion of the extraction solutions produced with hydrochloric acid solution, in which case the resistance is inversely proportional to the volume of acid required.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appears referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.