Photography — Processing chemicals — Specifications for hydroquinone
NORMA vydaná dňa 21.4.1994
Označenie normy: ISO 423:1994-ed.2.0
Dátum vydania normy: 21.4.1994
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy 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.