Photographic photosensitive solution manufacturing method and ap

Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement

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430569, G03C 1015

Patent

active

051660156

ABSTRACT:
A method and apparatus for manufacturing photographic photosensitive solultion to produce crystals of silver halide emulsion having a uniform size and shape and without substantial waste of expensive Ag.sup.+ solution. Flow control valves for controlling the flow rates of Ag.sup.+ and X.sup.- solutions are controlled according to a predetermined flow rate or pAg potential program and using output signals of respective flow meters or a pAg potentiometer. The flow control valves are motor-controlled flow control valves for which the rate of change of flow rate with valve stroke is small and linear.

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patent: 4147551 (1979-04-01), Finnicum et al.
patent: 4157289 (1979-06-01), Ikenoue et al.
patent: 4976404 (1990-12-01), Ichikawa et al.

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