Process for the production of negative continuous-tone images

Details Process for the production of negative continuous-tone images Process for the production of negative continuous-tone images

1975-07-07

1976-08-31

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Electric charge produced by friction

96 27R, 96 69, G03C 716, G03C 504, G03C 176

Patent

active

039778720

ABSTRACT:
Negative continuous-tone images or continuous-tone separation records having standardized contrast are produced from originals which are differing in contrast by means of a photograhic material the silver halide emulsion of which has a characteristic curve with a sagging course defined below, whereby the part of characteristic curve which is utilized for the production of the continuous-tone negative depends on the contrast of the original.

REFERENCES:
patent: 2535370 (1950-12-01), Pohl
patent: 3130053 (1964-04-01), Hellmig et al.
patent: 3141773 (1964-07-01), Hellmig
patent: 3300308 (1967-01-01), Jemseby
patent: 3396024 (1968-08-01), Hellmig et al.
patent: 3493370 (1970-02-01), Attinello
patent: 3663228 (1972-05-01), Wyckoff
patent: 3676122 (1972-07-01), Hellmig
patent: 3728121 (1973-04-01), Zorn et al.
patent: 3745008 (1973-07-01), Hellmig

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