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ISO 3620:1994

Photography — Processing chemicals — Specifications for aluminium potassium sulfate

Publication date:   Dec 15, 1994

General information

90.93   Standard confirmed   Jun 6, 2026

ISO

ISO/TC 42 Photography

International Standard

37.040.30   Photographic chemicals

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Scope

Establishes criteria for the purity of photographic-grade aluminium potassium sulfate dodecahydrate, AlK(SO4)2·12H2O, and specifies the tests to be used to determine the purity.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 3620:1976

NOW

PUBLISHED
ISO 3620:1994
90.93 Standard confirmed
Jun 6, 2026