NEN-ISO 419
Photography grade sodium thiosulphate, crystalline - Specification
inactive, Most Current
| Organization: | NEN |
| Publication Date: | 1 December 1977 |
| Status: | inactive |
| ICS Code (Photographic chemicals): | 37.040.30 |
scope:
This International Standard gives a specification for photographic grade crystalline sodium thiosulphate. It is one of a series to establish criteria of purity of chemicals suitable for processing photographic materials. A "photographic grade" chemical is one which meets purity requirements as described. This specification states the limiting concentrations and the test methods for certain inert or photographically harmful impurities that may be present.
Document History
NEN-ISO 419
December 1, 1977
Photography grade sodium thiosulphate, crystalline - Specification
This International Standard gives a specification for photographic grade crystalline sodium thiosulphate. It is one of a series to establish criteria of purity of chemicals suitable for processing...