Color photographic multilayer material with improved color densi

Details Color photographic multilayer material with improved color densi Color photographic multilayer material with improved color densi

1974-07-15

1976-03-23

Klein, David

Gas separation: apparatus

Electric field separation apparatus

With nonelectrical gas treating or conditioning means

96 84R, 96109, 96120, 260308R, 260302R, G03C 184, G03C 176, G03C 134, G03C 102

Patent

active

039458296

ABSTRACT:
Heterocyclic mercapto compounds are added to a binder layer containing colloidal silver which is comprised in a color photographic multilayer material. The colloidal silver layer may be a yellow filter layer to prevent exposure of the green, and red recording layers to blue light, or an antihalation layer arranged between the layer support and the lowermost light sensitive silver halide emulsion layer. The heterocyclic mercapto compounds reduce the contact fog produced in the (first) developer and increase color density in reversal processing. Additionally there can be present in the colloidal silver layer a sensitizer for the blue, green or red spectral region.

REFERENCES:
patent: 2220187 (1940-11-01), Wilmanns et al.
patent: 2231127 (1941-02-01), Kendall
patent: 2336327 (1943-12-01), Weissberger et al.
patent: 2464798 (1949-03-01), Duerr et al.
patent: 2533514 (1950-12-01), Sandey et al.
patent: 2534599 (1950-12-01), Howe
patent: 2865748 (1958-12-01), Feniak et al.
patent: 3342597 (1967-09-01), Harnish et al.

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