Method and apparatus for altering the pH of a photographic devel

Details Method and apparatus for altering the pH of a photographic devel Method and apparatus for altering the pH of a photographic devel

1995-08-28

1997-09-23

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Developer

430398, 430434, G03C 5395

Patent

active

056703031

ABSTRACT:
A method for altering the pH of a photographic developing solution comprises altering the hydroxide ion concentration of the solution electrolytically. The method may be employed in photographic processing apparatus comprising a photographic development stage in which a photographic material to be processed is treated with a photographic developing solution wherein the apparatus comprises means for electrolytically altering the hydroxide ion concentration of the developing solution and means for controlling the operation of electrolytically altering the hydroxide ion concentration based on the change of hydroxide ion concentration in use.

REFERENCES:
patent: 4089760 (1978-05-01), Ono
patent: 4145271 (1979-03-01), Nosse et al.
patent: 4207157 (1980-06-01), Hirai et al.
patent: 4217188 (1980-08-01), Ono
patent: 4311574 (1982-01-01), Ishikawa
patent: 4313808 (1982-02-01), Idemoto et al.

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