Method for maintaining the development activity of a photographi

Details Method for maintaining the development activity of a photographi Method for maintaining the development activity of a photographi

1978-01-30

1980-10-14

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Developer

430265, 430268, G03C 530

Patent

active

042282349

ABSTRACT:
A method for processing silver halide lithographic photosensitive materials with a lithographic developer using an automatic developing machine, the improvement comprising maintaining constant the development activity of the lithographic developer by adding supplemental amounts of two kinds of replenishers to the lithographic developer with a replenisher (RD) being employed to compensate for the decrease in the development activity of the lithographic developer resulting from the development-processing of lithographic photosensitive materials and a replenisher (RO) being employed to compensate for the decrease in the development activity of the lithographic developer resulting from the passage of time, where replenishers (RD) and (RO) differ in free sulfite ion concentrations, bromide ion concentrations and pH, wherein the method comprises adding a supplemental amount of replenisher (RD) during the development-processing operation as herein defined and, prior to the start of each development-processing operation, adding a supplemental amount of replenisher (RO) as herein defined.

REFERENCES:
patent: 4025344 (1977-05-01), Allen et al.
patent: 4081280 (1978-03-01), Corluy et al.
Mason, Photographic Processing Chemistry, pp. 138-141, 164-170, and 180-181, 1976.
Ilford, Manual of Photography, pp. 410-414, 1958.
Sincius, Litho Processing: Its Finest Hour, TACA Meeting, 5/1976.
Dupont: Quality Control, pp. 1-43, 12/1975.
Cronolith, Blender & Chemistry Systems, 3/1976.

Affiliated with

Also associated with

Rating

Method for maintaining the development activity of a photographi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for maintaining the development activity of a photographi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for maintaining the development activity of a photographi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2101569