Photography — Processing chemicals — Specifications for hydroquinone
NORM herausgegeben am 21.4.1994
Bezeichnung normen: ISO 423:1994-ed.2.0
Ausgabedatum normen: 21.4.1994
Zahl der Seiten: 6
Gewicht ca.: 18 g (0.04 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: Establishes criteria for the purity and describes the test methods for identity tests, residue after ignition, heavy metals content, iron content, appearance of solution. Annex A describes preparation of the standard ammonium cerium(IV) hexanitrate solution.