Reference number
ISO 10349-9:1992
ISO 10349-9:1992
© ISO 2024
International Standard
ISO 10349-9:1992
Photography — Photographic-grade chemicals — Test methods — Part 9: Reaction to ammoniacal silver nitrate
Edition 1
1992-12
1992-12
ISO 10349-9:1992
21266
Published
(Edition 1, 1992)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method is based on weighing a test portion, dissolving it in water, transfer of the solution to each of two Nessler colour-comparison cylinders, preparing a test solution by adding freshly prepared ammoniacal silver nitrate solution to one of the Nessler cylinders and mixing well, preparing a blank solution by adding ammonium hydroxide solution and water to the other Nessler cylinder and mixing well, allowing the solutions to stand for 2 min, and comparing the colour and turbidity of the two solutions.