Photocopying – Contact printing – Light boxes
Patent
1983-11-30
1985-05-21
Perkey, William B.
Photocopying
Contact printing
Light boxes
355 38, 356443, G03B 2700, G03B 4100
Patent
active
045182345
ABSTRACT:
The method for reproducing at least one colored surface the color of which corresponds to a reference chosen from a color chart is characterized by the fact that during a first stage, there is recorded on a photographic emulsion of the same type a sensitogram developed by means of developing materials of predetermined characteristics, a densitometric analysis of said developed sensitogram is made and the results of said analysis recorded so as to establish an analytical record of the colors comprising the sensitometer with respect to the photographic emulsion and the developing products used. During a second stage, the exposure conditions for the photographic emulsion are determined to reproduce the color chosen from the color chart as a function of the information registered on the analytical record of the colors of the sensitogram. The apparatus used in this process comprises essentially an exposure unit (11), a sensitometer (16) and a central control unit (22).
REFERENCES:
patent: 2457746 (1948-12-01), Sweet
patent: 3636851 (1972-01-01), Furst
patent: 3700335 (1972-10-01), Seelbinder
patent: 4101216 (1978-07-01), Grossman
patent: 4150894 (1979-04-01), Meyer et al.
patent: 4249807 (1981-02-01), Webster et al.
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