Rapid processing of high contrast aerial color negative film
AssigneeEastman Kodak Company
InventorsThomas P. Larkin, Steven A. Mango, Charles F. Leith, Daniel T. Kennelly
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Abstract
High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.
Claims17
A method of providing a color negative image having a contrast of at least 0.83, a Dmin less than 0.45, an rms granularity of less than 17, a modulation transfer function greater than 39 DMT, a resolving power greater than 80 at 1000:1 high contrast test target and a resolving power greater than 63 at 1.6:1 low contrast test target, said method comprising:
- A) contacting an “unmasked” color negative silver halide photographic film with a color developing composition having a pH of from about 10.2 to about 10.6 and comprising at least 0.006 mol/l of a color developing agent,
- said contacting being carried out for less than 180 seconds at a temperature of from about 40 to about 42° C.
A method of providing a color negative image having a contrast of at least 0.8, a Dmin less than 0.41, as rms granularity of less than 16, a modulation transfer function greater than 39 DMT, a resolving power greater than 100 at 1000:1 high contrast test target and a resolving power greater than 63 at 1.6:1 low contrast test target, said method comprising:
- A) contacting an “unmasked” color negative silver halide photographic film with a color developing composition having a pH of from about 9 to about 12 and comprising at least 0.01 mol/l of a color developing agent,
- said contacting being carried out for at least 240 seconds at a temperature of from about 37 to about 39° C.
Dependencies are inferred from the claim text.