ISO 418:1994 PDF
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Photography — Processing chemicals — Specifications for anhydrous sodium sulfite
Establishes criteria for the purity and describes the test methods for insoluble matter content, heavy metals content, iron content, alkalinity, reaction to ammoniacal silver nitrate, thiosulfate, appearance of solution.
| Edition | 1994 |
|---|---|
| Published Date | 1994 |
| Published By | International Standardization Organisation |
| Page Count | 5 |
