ISO 8424:2023
International Standard
Current Edition
·
Approved on
28 July 2023
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Raw optical glass — Resistance to attack by aqueous acidic solutions — Test method and classification
ISO 8424:2023 Files
null Pages
Current Edition
ISO 8424:2023 Scope
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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