ISO 3628:1994 PDF
Photography — Processing chemicals — Specifications for boric acid, granular
Photography — Processing chemicals — Specifications for boric acid, granular
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 21 апреля 1994 г.
- Издание:
- ISO IS 3628 edition 2 version 1
- ICS:
- 37.040.30
Establishes criteria for the purity and describes the test methods for residue after ignition, heavy metals content, iron content, appearance of solution.
Abstract
Overview
ISO 3628:1994 sets the international standards for photographic-grade granular boric acid, specifying strict criteria for its purity and detailing standardized test methods. This standard ensures the chemical meets the essential requirements for use in photographic processing chemicals, focusing on purity factors such as residue after ignition, heavy metals content, iron content, and solution appearance. Developed by ISO Technical Committee ISO/TC 42 on Photography, this edition updates and replaces the previous 1976 version, reflecting advances in analytical techniques and industry needs.
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