Factors Affecting the Accumulation of Iodide in Used Photographic Developers

Development of uniformly flashed motion picture film has been carried out in developers of varying composition and the amount of iodide, which remains in the developer, determined by analysis. The amount of iodide has been found to depend on the following factors: (1) Developed density. Increased density gives increased iodide. (2) Footage of film. Increased footage for a given volume of developer gives increased iodide. (3) Time of development. Increased development time for the same density gives increased iodide, (4) Strength of developer. An increase in the activity of the developer gives increased iodide. (5) Distribution of the image. If partly unexposed film was run through the developer the amount of iodide decreased as the proportion of unexposed film increases.

Print ISSN

0097-5834

Published

1943-02

Content type

Original Research

DOI

10.5594/J14278