NEN-ISO 418
Photography - Processing chemicals - Specifications for anhydrous sodium sulfite
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 January 2002 |
| Status: | active |
| Page Count: | 18 |
| ICS Code (Photographic chemicals): | 37.040.30 |
scope:
Establishes criteria for the purity of photographic-grade anhydrous sodium sulfite and specifies the tests to be used to determine the purity.
Document History
NEN-ISO 418
January 1, 2002
Photography - Processing chemicals - Specifications for anhydrous sodium sulfite
Establishes criteria for the purity of photographic-grade anhydrous sodium sulfite and specifies the tests to be used to determine the purity.
April 1, 1978
Photography - Sodium sulphite, anhydrous, photographic grade - Specification
This International Standard specifies the purity requirements of, and test methods for, photographic grade sodium sulphite, anhydrous.