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.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO 8424 |
| Publication Date | Not Available |
| Language | en - English |
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| Committee | ISO/TC 172/SC 3 |