Developer composition and process for developing photographic fi

Details Developer composition and process for developing photographic fi Developer composition and process for developing photographic fi

1977-01-17

1978-04-11

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 663, G03C 530

Patent

active

040837220

ABSTRACT:
A composition useful as a developer for high-contrast, extremely fine and microfine grain silver halide-containing emulsions comprises at least one 3-pyrazolidone compound, at least one hydroxybenzene compound, and p-methylaminophenol sulfate, at least one accelerator and at least one alkaline preservative. This composition is a semi-compensating, low contrast, fine grain, developer for producing normal contrast photographic negatives from exposed film emulsions generally considered to be capable of reproducing only black or white with repression of almost all gray tones found in normal tone-graduated subjects.

REFERENCES:
patent: 2289367 (1942-07-01), Kendall
patent: 3687669 (1972-08-01), Iijima et al.
patent: 3772019 (1973-11-01), Holden et al.
patent: 3839046 (1974-10-01), Gent
patent: 3865591 (1975-02-01), Katz
patent: 3867151 (1975-02-01), Katz

Affiliated with

Also associated with

Rating

Developer composition and process for developing photographic fi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Developer composition and process for developing photographic fi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developer composition and process for developing photographic fi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-987496