Method of producing high quality photographs on microfiche

Details Method of producing high quality photographs on microfiche Method of producing high quality photographs on microfiche

1977-08-22

1979-05-08

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

With means to add charged solid or liquid particles to...

96 45, 96 49, G03C 504, G03F 500, G03C 158

Patent

active

041534565

ABSTRACT:
There is disclosed a method for producing improved quality photographs on microfilm and improved quality diazo microfiche duplicates. A negative half-tone image of a real world subject is produced on a photosensitive medium. A negative of that image is then formed on microfilm, such negative being a positive half-tone image of the real world subject. Diazo duplicates are then made, if desired, using the negative image (positive half-tone image of the real world subject) on the microfilm as the master.

REFERENCES:
patent: 3218165 (1965-11-01), Foote
patent: 3589899 (1971-06-01), Hersh
Photographic Reproduction, Denstman & Schultz, 1963, pp. 135-158, 170-176.
Camera Copying & Reproduction, by Croy, 1964, pp. 221-222.
Kodagraph, Reproduction Materials, 1952, pp. 17-21, 1 Supplement 1-8.

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