ISO 422:1994
Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate

Standard No.

ISO 422:1994

Release Date

1994

Published By

International Organization for Standardization (ISO)

Latest

ISO 422:1994

Scope

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.

ISO 422:1994 history

• 1994 ISO 422:1994 Photography - Processing chemicals - Specifications for p-methylaminophenol sulfate
• 1976 ISO 422:1976 Photographic grade p-methylaminophenol sulphate; Specification