ISO 418:2001 PDF
Photography — Processing chemicals — Specifications for anhydrous sodium sulfite
Photography — Processing chemicals — Specifications for anhydrous sodium sulfite
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 7
- Дата публикации:
- 20 декабря 2001 г.
- Издание:
- ISO IS 418 edition 3 version 1
- ICS:
- 37.040.30
This International Standard establishes criteria for the purity of photographic-grade anhydrous sodium sulfite and specifies the tests to be used to determine the purity.
Abstract
Overview
ISO 418:2001 - "Photography - Processing chemicals - Specifications for anhydrous sodium sulfite" defines purity criteria and test requirements for photographic‑grade anhydrous sodium sulfite (Na2SO3). The standard specifies chemical and physical requirements, analytical test methods (including an iodine titration assay), storage and handling notes, and acceptance limits intended to prevent undesirable photographic effects caused by impurities.
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