Photographic elements having hydrophilic colloid layers containi

Details Photographic elements having hydrophilic colloid layers containi Photographic elements having hydrophilic colloid layers containi

1977-07-08

1979-01-09

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 95, 96114, 961141, G03C 148, G03C 106, G03C 172, G03C 102

Patent

active

041336879

ABSTRACT:
A photographic element is disclosed having coated on a support a hydrophilic colloid layer containing an activator precursor and loaded polymer particles of from 0.02 to 0.2 micron in average diameter. The polymer particles consist essentially of a hydrophobic polymer of which at least 2 percent by weight is comprised of ionizable repeating units, at least half being cationically ionizable, and a hydrophobic developing agent present in a weight ratio to the polymer of from about 1:4 to 3:1. Silver halide is present in the hydrophilic colloid layer or in an adjacent layer, and the activator precursor is present in a concentration of from 1 to 4 equivalent for each mole of silver halide. The photographic element is capable of being thermally processed.

REFERENCES:
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patent: 3301678 (1967-01-01), Humphlett et al.
patent: 3518088 (1970-06-01), Dunn et al.
patent: 3531285 (1970-09-01), Haist et al.
patent: 3619195 (1971-11-01), Van Campen
patent: 3816137 (1974-06-01), Gabrielsen et al.
patent: 4060420 (1977-11-01), Merkel et al.
"Photographic Silver Halide . . . Systems", Research Disclosure #9232, 12/1971, pp. 107-110.
"Process for Achieving . . . Latex Compositions", Chen, Research Disclosure, No. 15930, 7/1977, pp. 62-74.

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