Photography – Fluid-treating apparatus – Having fluid-circulating means
Patent
1998-10-06
2000-08-22
Rutledge, D.
Photography
Fluid-treating apparatus
Having fluid-circulating means
396636, G03D 302
Patent
active
061061697
ABSTRACT:
Method and apparatus are disclosed for washing exposed photographic material in less time and with a reduced replenishment rate compared with conventional processing. Multi-stage counter-current washing is employed, in which the time that the material spends in each stage is such that equilibrium of chemical concentration between solution contained in the material and solution contained in the stages (a) is reached in the final stage, but (b) is reached in fewer than all the stages, and wherein the material resides in at least one stage for a time that is different from that in at least one other of the stages. Preferably the longest time is spent in the final stage. The time distribution throughout the stages can be optimized to produce a final tank concentration comparable to that obtained with conventional processing.
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Adam Henry H.
Evans Gareth B.
Eastman Kodak Company
Pincelli Frank
Rutledge D.
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