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ISO 8424:2023

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

Publication date:   Jul 28, 2023

General information

60.60 Standard published   Jul 28, 2023

ISO

ISO/TC 172/SC 3 Optical materials and components

International Standard

81.040.10   Raw materials and raw glass

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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”.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 8424:1996

NOW

PUBLISHED
ISO 8424:2023
60.60 Standard published
Jul 28, 2023