Photographic elements containing light scattering particles

Details Photographic elements containing light scattering particles Photographic elements containing light scattering particles

1998-12-17

2000-02-22

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430569, 430639, 430640, 430599, 430600, 430603, 430950, G03C 110, G03C 108, G03C 1035

Patent

active

060278692

ABSTRACT:
A photographic element is disclosed having at least one emulsion layer comprised of (a) radiation-sensitive silver halide grains, (b) sensitizer for the radiation-sensitive silver halide grains, (c) hydrophilic colloid vehicle, including peptizer for the radiation-sensitive silver halide grains, and (d) light scattering particles, wherein (a) the radiation-sensitive silver halide grains include tabular grains (1) having an aspect ratio of at least 2.0, (2) having {111} major faces, (3) containing greater than 50 mole percent bromide, based on silver, and (4) accounting for greater than 50 percent total grain projected area, (b) the sensitizer includes a fragmentable electron donating sensitizer, (c) the peptizer is a water dispersible cationic starch, and (d) the light scattering particles have aspect ratios of less than 1.5 and can be dissolved for removal from the emulsion layer. The photographic elements exhibit enhanced imaging speed and can be employed for color or black-and-white photographic imaging.

REFERENCES:
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patent: 5604085 (1997-02-01), Maskasky
patent: 5620840 (1997-04-01), Maskasky
patent: 5667955 (1997-09-01), Maskasky
patent: 5691131 (1997-11-01), Maskasky
patent: 5733718 (1998-03-01), Maskasky
patent: 5747235 (1998-05-01), Farid et al.
patent: 5747236 (1998-05-01), Farid et al.
Research Disclosure, vol. 389, Sep. 1996, Item 38957, I., II., IV., V., and X.

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