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ISO 719:2020

Glass — Hydrolytic resistance of glass grains at 98 °C — Method of test and classification
11 sht 2020

General information

90.93     3 dhj 2025

ISO

ISO/TC 76

International Standard

81.040.01  

anglisht   frëngjisht  

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Scope

This document specifies
a) a method for determining the hydrolytic resistance of glass grains at 98 °C. The resistance is measured and expressed by the volume of acid required for titration of the alkali extracted from the unit mass of glass, and can also be expressed by the amount of sodium oxide equivalent to this volume of acid, and
b) a classification of glass according to the hydrolytic resistance determined by the method of this document.
This document is intended for use on the less resistant types of glass, such as soda-lime glass.
NOTE 1 For the more resistant glasses, e.g. borosilicate glass, the method specified in ISO 720 is more suited.
NOTE 2 It is emphasized that there is no exact correlation between the classification laid down in this document and that laid down in ISO 720, and it is, therefore, essential to identify which classification is being used.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 719:1985

NOW

PUBLISHED
ISO 719:2020
90.93 Standard confirmed
3 dhj 2025