ISO - 8424
Raw optical glass — Resistance to attack by aqueous acidic solutions — Test method and classification
| Organization: | ISO |
| Publication Date: | 1 July 2023 |
| Status: | active |
| Page Count: | 24 |
| ICS Code (Raw materials and raw glass): | 81.040.10 |
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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