Method for controlling the activity of an inorganic development

Details Method for controlling the activity of an inorganic development Method for controlling the activity of an inorganic development

1998-03-11

2000-02-15

Rutledge, D.

Photography

Fluid-treating apparatus

Photocell controlled

396578, 396626, 396632, G03D 302, G03D 1300

Patent

active

060245018

ABSTRACT:
The invention concerns a method for controlling the activity of a development composition which comprises, as a developing agent, an organometallic complex. The method includes measuring the variations in optical density difference of the composition that varies with the degree of oxidation of the organometallic complex. The method also makes it possible to regenerate the development composition by means of an electrolysis current. A device for controlling the activity of the development composition includes two light-emitting diodes of different wavelengths, the light beams of which pass through the development composition, and photodiodes to receive transmitted light.

REFERENCES:
patent: 5489961 (1996-02-01), Burbury et al.
patent: 5656515 (1997-08-01), Roussilhe et al.
patent: 5686232 (1997-11-01), Roussilhe et al.

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