Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement
Patent
1988-07-14
1989-11-21
Dees, Jose G.
Radiation imagery chemistry: process, composition, or product th
Including control feature responsive to a test or measurement
430302, 430309, 430331, 118663, 354299, 354320, 354324, G03C 500
Patent
active
048822469
ABSTRACT:
A method for supplementing a replenisher for developer which comprises developing a large number of PS plates imagewise exposed to light with a developer composed of an aqueous solution containing electrolytes in an automatic developing machine, characterized by determining an AC impedance of the developer contained in the automatic developing machine, obtaining a correction impedance from the measured impedance value and rate of replacement and supplementing a desired amount of the replenisher to the developer when the correction impedance reaches a predetermined value. This method makes it possible to maintain a desired activity of the developer even when a large number of PS plates are processed and to relax the restriction on the incorporation of optional devices such as an autofeeder into the automatic developing machine.
REFERENCES:
patent: 4259434 (1981-03-01), Yamasue et al.
patent: 4452880 (1984-06-01), Seino et al.
patent: 4469776 (1984-09-01), Matsumoto et al.
patent: 4537496 (1985-08-01), Ohba et al.
patent: 4737810 (1988-04-01), Kobayashi et al.
Kunichika Kenji
Ohba Hisao
Takekoshi Tomoaki
Dees Jos,e G.
Fuji Photo Film Co. , Ltd.
Loney Donald J.
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