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ISO 8424:2023

Raw optical glass — Resistance to attack by aqueous acidic solutions — Test method and classification

General information

Valid from 28.07.2023
Directives or regulations
None

Standard history

Status
Date
Type
Name
28.07.2023
Main
20.06.1996
Main
This document specifies two methods for testing the resistance of raw optical glasses to attack by aqueous acidic solutions and defines a classification of optical glasses according to the acid resistance determined by these methods.
The surface method tests the resistance of the polished plate-shaped optical glass to attack by aqueous acidic solutions at 25 °C for a specified time and indicates the class determined by this method as “SR-S”.
The powder method tests the resistance of crushed granular optical glass to attack by an acidic aqueous solution at above 98 °C for 1 h, and indicates the class determined by this method as “SR-P”.

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