Photocopying – Projection printing and copying cameras – Methods
Patent
1975-11-05
1977-07-12
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Methods
355119, G03B 2732, G03B 2716
Patent
active
040350789
ABSTRACT:
Photograph film negatives with specular densities so low that they are not usable with transmitted light, e.g., densities below 0.3, may be used with substantially increased contrast and resolution when illuminated with a beam of light which is scattered by the developed silver grains of the film and viewed against a light absorbing background. Apparatus for practicing this method includes a light table for film readout convertible for conventional film readout; and copy camera-enlargers.
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Reichel Paul
Woo Harry W.
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