Auxiliary developer processing

Details Auxiliary developer processing Auxiliary developer processing

1978-07-18

1979-10-30

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

With control means responsive to sensed condition

96 50PT, 96 65, 96 66R, G03C 716, G03C 526, G03C 530

Patent

active

041727231

ABSTRACT:
In the development of color negatives the same are pre-soaked in an acid-inhibited developing agent bath of typically two to four times normal concentration. Subsequent substantially normal development provides up to 21/2 stops (six times) greater sensitivity of the emulsion after photographic underexposure. Excessive contrast, grain, and fog are minimized, and necessary tracking parallelism of the contrast curves for the three layers of the color-sensitive emulsion is maintained. Deliberate underexposure in studio motion-picture-making can now be allowed, thereby to effect a highly significant saving of electrical energy in stage lighting.

REFERENCES:
patent: 1923764 (1933-08-01), Troland
patent: 1973466 (1934-09-01), Crabtree
patent: 2238495 (1941-04-01), Mannes et al.
patent: 2541490 (1951-02-01), Yule
patent: 3183087 (1965-05-01), Lohmer et al.
patent: 3574621 (1971-04-01), Scholler
patent: 3671246 (1972-06-01), Corben et al.
patent: 3716363 (1973-02-01), Ruggerio
patent: 3740227 (1973-06-01), Reyes
patent: 3869288 (1975-03-01), Godowsky
J. Soc. Mot. Pic. Engrs., 21 Jul.-Dec. 1933, pp. 21-53.
Camera 35, Leonian "Comments on Color", Feb./Mar. 1960, pp. 8, 10.

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