Lithographic developer replenishment process

Details Lithographic developer replenishment process Lithographic developer replenishment process

1975-05-23

1977-05-24

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 63, 96 66R, G03C 526, G03C 524, G03C 530

Patent

active

040253449

ABSTRACT:
Lithographic developer in an automatic photographic film processor is replenished from at least two stable solution concentrates. As each quantity of lithographic film is processed predetermined amounts of the solution concentrates and water are mixed and immediately added to the developer. The solution concentrates, stable before mixing, contain all the constituents needed to replenish the developer solution to maintain activity at a desired level. The amount of each solution concentrate is predetermined from the concentration of each solution concentrate and the quantity and developer requirements of the film. The frequency of replenishment is predetermined from the usage pattern.

REFERENCES:
patent: 2073664 (1937-03-01), Weisberg et al.
patent: 3334566 (1967-08-01), Friedel
patent: 3388653 (1968-06-01), Mayfield
patent: 3472143 (1969-10-01), Hixon et al.
patent: 3647462 (1972-03-01), Surash
Mason, Processing Chemistry, 1966, pp. 136-139, 147-151.
Ilford, Manual of Photography, 1960, pp. 413-414.
Photo Lab-Index, 1971, 3-201, 202, 204.07-204.12, 215-216.
Handbook of Photography, 1940, pp. 368-369.

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