Photographic chemistry

Details Photographic chemistry Photographic chemistry

1981-08-03

1983-05-10

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430484, 430485, 430486, 430490, 430493, G03C 530

Patent

active

043830285

ABSTRACT:
A photographic chemistry comprised of a solution containing a mixture of different chemicals which cooperate to minimize the need for long film exposure times to achieve high film quality and contrast. The photographic chemistry includes a number of alkalies in a pH range from about 8 to 14, a developer in solution with the alkalies, a solvent mixed with the alkalies and the developer, a modified alkanolamide in solution with the alkalies, the developer and the solvent, and a hydrotrope mixed with the modified alkanolamide. Other chemicals that can be used in the photographic chemistry include an emulsion penetrant, a cleaner for various components of film processing equipment, a chelating agent, and an enzyme to enhance the reactions of the various chemicals in the photographic chemistry. A specific mixture of chemicals is disclosed.

REFERENCES:
patent: 3438776 (1969-04-01), Yudelson
patent: 3489686 (1970-01-01), Parran
patent: 3594322 (1971-07-01), Wilson
patent: 3859225 (1975-01-01), McKnight
patent: 4267255 (1981-05-01), Schreiber
Research Disclosure, Apr. 1974, 12021, pp. 14-16.
Abst. of Belgium patent 612439, Jan. 9, 1962.

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