ISO 423:1994
Current
The latest, up-to-date edition.
Photography — Processing chemicals — Specifications for hydroquinone
Hardcopy , PDF
English, French
21-04-1994
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.
| Committee |
ISO/TC 42
|
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| BS ISO 423:1994 | Identical |
| I.S. ISO 5799:1991 | PHOTOGRAPHY - DIRECT-EXPOSURE MEDICAL AND DENTAL RADIOGRAPHIC FILM/PROCESS COMBINATIONS - DETERMINATION OF ISO SPEED AND AVERAGE GRADIENT |
| ISO 10349-5:1992 | Photography — Photographic-grade chemicals — Test methods — Part 5: Determination of heavy metals and iron content |
| ISO 565:1990 | Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings |
| ISO 10349-1:2002 | Photography — Photographic-grade chemicals — Test methods — Part 1: General |
| ISO 10349-4:1992 | Photography — Photographic-grade chemicals — Test methods — Part 4: Determination of residue after ignition |
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