Control apparatus for silver halide emulsion making

Details Control apparatus for silver halide emulsion making Control apparatus for silver halide emulsion making

1975-11-24

1977-05-31

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

417 22, 417293, G01N 2700, G03C 102

Patent

active

040266680

ABSTRACT:
The disclosure relates to a control apparatus for the preparation of silver halide emulsions in which the flow rates of the reactants can be controlled to provide a desired pAg in the precipitation vessel. Several embodiments are used, depending upon the desired accuracy of pAg. The pAg and flow rate can also be caused to follow programs to maintain constant, or to vary, the pAg during a particular emulsion making process.

REFERENCES:
patent: 1951035 (1934-03-01), Parker
patent: 2711750 (1955-06-01), Norcross
patent: 3031304 (1962-04-01), Oliver
patent: 3129717 (1964-04-01), Main et al.
patent: 3656911 (1972-04-01), Hobbs
patent: 3730685 (1973-05-01), Prohaska
patent: 3733473 (1973-05-01), Child et al.
patent: 3791793 (1974-02-01), Friedmann et al.

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