Process for preparing slightly soluble silver salt grains

Details Process for preparing slightly soluble silver salt grains Process for preparing slightly soluble silver salt grains

1978-05-08

1979-06-05

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

96 48HD, 96 97, 961141, 423491, B01K 300, G03C 102, G03C 176

Patent

active

041572890

ABSTRACT:
A process for preparing slightly soluble silver salt grains by mixing a solution or dispersion of a silver salt forming agent as a first liquid with a solution or dispersion of a silver ion-providing agent as a second liquid while controlling the electrode potential of the mixture of the first liquid and the second liquid using a measuring electrode and a reference electrode to produce the slightly soluble silver halide grains of specific characteristics depending upon the control of the electrode potential, the improvement which comprises the reference electrode comprising an internal electrode of a metal immersed in an internal solution of a metal salt of the metal of the internal electrode and an electrolyte, which metal salt and electrolyte do not release halide ions in the same liquid present as the major component in either of the first liquid or the second liquid.

REFERENCES:
patent: 3532502 (1970-10-01), Boyer et al.
patent: 3676319 (1972-07-01), Kirsten
patent: 3706565 (1972-12-01), Ericson
patent: 3770448 (1973-11-01), Poot et al.
patent: 3844797 (1974-10-01), Willems et al.
patent: 3933508 (1976-01-01), Ohkubo et al.
patent: 4002547 (1977-01-01), Neti et al.
patent: 4028129 (1977-06-01), Suzuki et al.

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