Codes & Standards - Purchase
ISO 423:1994
Photography -- Processing chemicals -- Specifications for hydroquinone
SKU: iso_004432_100770
Published by ISO
Publication Year 1994
2 Edition
6 pages
Product Details
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.