Accession Number : ADD001001

Title :   Pre-Development Latensification Using Polyalkylene Amines.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Levy,Marilyn

Report Date : 16 Aug 1966

Pagination or Media Count : 2

Abstract : This invention relates to a method of increasing the effective speed of silver halide photographic emulsions. Examples of such prior methods are as follows: The use of high speed developers or extended development time; hypersensitization or treatment before camera exposure; intensification after development; and latent image intensification or latensification between exposure and development. Latensification may be accomplished by bathing the emulsion in a solution of certain chemicals, exposure to vapors or exposure to light. This invention relates to latensification by bathing. The present invention is based on the discovery that certain chemical compounds, the nature of which will be specified later, serve to effectively increase the film speed of silver halide photographic emulsions when used as a post latensification bath after exposure, and before development.

Descriptors :   *Photographic film, *Patents, *Photographic processing, Amines

Subject Categories : Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE