ISO 422:1994 PDF
Photography — Processing chemicals — Specifications for p-methylaminophenol sulfate
Photography — Processing chemicals — Specifications for p-methylaminophenol sulfate
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 8
- Дата публикации:
- 20 октября 1994 г.
- Издание:
- ISO IS 422 edition 2 version 1
- ICS:
- 37.040.30
Cancels and replaces the first edition (1976). Lays down criteria for the purity of photographic-grade p-methylaminophenol sulfate and specifies the test methods to be used to determine the purity.
Abstract
Overview
ISO 422:1994 - Photography - Processing chemicals - Specifications for p‑methylaminophenol sulfate - defines purity criteria and test methods for photographic‑grade (HOC6H4NHCH3·½H2SO4). This second edition (1994) cancels the 1976 first edition and specifies chemical and physical requirements, sampling, and analytical procedures to ensure material suitability for photographic processing solutions.
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