Process for making changes on photoprint film

Details Process for making changes on photoprint film Process for making changes on photoprint film

1975-06-26

1978-01-24

Kelley, Mary F.

Photocopying

Projection printing and copying cameras

Methods

96 27R, 96 41, G03B 2732, G03C 504

Patent

active

040701093

ABSTRACT:
A process for making changes on photoprint film by placing a red coloring mask over spots on a film to be corrected, and with the mask being impenetrable by short wave length light. Next, photographically projecting the film so that the colored spots are not projected, and then photographically projecting another film, with the corrections thereon, and projecting it on the firstmentioned film, all so that the final film is a corrected film accomplished through the use of placing a red coloring mask to prevent projecting of portions of the film to be corrected.

REFERENCES:
patent: 2740324 (1956-04-01), Cahill
patent: 3669666 (1972-06-01), Kleitman et al.
patent: 3717975 (1973-02-01), Bloom
patent: 3890148 (1975-06-01), Lawson et al.
patent: 3902901 (1975-09-01), Vogel
Langford, Basic Photography, 1965, pp. 316-317.

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