Process for forming optical sound track

Details Process for forming optical sound track Process for forming optical sound track

1974-08-05

1976-03-23

Klein, David

Gas separation: apparatus

Apparatus for selective diffusion of gases

96 22, 96 55, 96 60BF, 96 66R, G03C 724, G03C 716, G03C 532, G03C 530

Patent

active

039458245

ABSTRACT:
A process for forming an optical sound track which comprises applying a nitrogen containing heterocyclic compound in which at least one of the nitrogen atoms is connected to a group having 6 or more carbon atoms to form a quaternary salt to a sound track area of a multilayer color photographic material, after color development but prior to a bleaching step, whereby an optical sound track can be easily prepared on a conventional multilayer color photographic material.

REFERENCES:
patent: 2648604 (1953-07-01), Welliver et al.
patent: 3705800 (1972-12-01), Lane
patent: 3705803 (1972-12-01), Bevis et al.

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