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ISO 424:1994

Photography — Processing chemicals — Specifications for anhydrous sodium carbonate and sodium carbonate monohydrate ISO 424:1994

Publication date:   Oct 20, 1994

General information

90.93   Standard confirmed   Jun 6, 2026

ISO

ISO/TC 42 Photography

International Standard

37.040.30   Photographic chemicals

Buying

Published

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Scope

Cancels and replaces the first edition (1976). Establishes criteria for the purity of photographic-grade anhydrous sodium carbonate and sodium carbonate monohydrate and specifies the test methods to be used to determine the purity.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 424:1976

WITHDRAWN
ISO 3942:1976

NOW

PUBLISHED
ISO 424:1994
90.93 Standard confirmed
Jun 6, 2026




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