Silver halide emulsion, method of preparing the same and...

Details Silver halide emulsion, method of preparing the same and... Silver halide emulsion, method of preparing the same and...

2007-07-03

2007-07-03

Visconti, Geraldina (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

C430S567000, C430S572000, C430S574000, C430S576000

Reexamination Certificate

active

10893885

ABSTRACT:
A silver halide emulsion comprising silver halide grains covered with two dye layers in combination. The two dye layers comprises an inner dye layer adjoining to the silver halide grain, and containing at least one sensitizing dye capable of spectrally sensitizing silver halide, and an outer dye layer adjoining to the inner dye layer, and containing at least two dyes. The light absorption energy of the outer dye layer is equal to or higher than that of the inner dye layer, an energy-releasing wavelength of the outer dye layer overlaps with an energy-absorbing wavelength of the inner dye layer, the sensitizing dyes constituting the inner dye layer include an anion and/or betaine dyes, the dyes constituting the outer dye layer include an anion and cation dyes, and the anion dye is more than the cation dye in terms of an addition amount and/or an adsorption amount.

REFERENCES:
patent: 6117629 (2000-09-01), Yamashita et al.
patent: 6143486 (2000-11-01), Parton et al.
patent: 6331385 (2001-12-01), Deaton et al.
patent: 6558893 (2003-05-01), Parton et al.
patent: 6582894 (2003-06-01), Hioki et al.
patent: 6610466 (2003-08-01), Sakurada et al.

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