Photographic enlargements

Details Photographic enlargements Photographic enlargements

1983-05-31

1985-02-05

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 52, 355 77, G03B 2752, G03B 2732

Patent

active

044975716

ABSTRACT:
A method of and apparatus for producing a second photographic negative film segment having low grain from an original high grain negative in which an enlarger projects an image of the original negative onto five grain film located at an image plane on a light box. After development of the last-named film it is located at the same image plane, illuminated by the light source in the light box, and a third film segment is exposed at the same plane initially carrying the original high grain negative.

REFERENCES:
patent: 2552990 (1951-05-01), McKay
patent: 2970515 (1961-02-01), Simpson
patent: 2982176 (1961-05-01), Kay
patent: 4003653 (1977-01-01), Kelly

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