Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1988-07-08
1990-08-28
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430569, G03C 102
Patent
active
049524895
ABSTRACT:
A light-sensitive emulsion layer comprising a dispersing medium and silver halide grains, wherein at least 10% of the total projected area of the silver halide grains is formed by silver bromo-iodide grains bounded by at least one substantially concave-shaped major crystal face, having a diameter of at least 0.6 .mu.m and the half of their thickness, in the deepest point of said concavity, of less than 80% of the half of their border thickness. Photographic elements comprising a support base and at least one such emulsion layer are shown.
Multi-step process for preparing an emulsion of light-sensitive silver halide grains dispersed in a hydrophilic dispersing medium which comprises a first double-jet precipitation step for the formation of silver halide growing nuclei, a second double-jet precipitation step of first diameter growth of said nuclei and a third step of grain second growth by means of single-jet solution of silver salts, characterized by the fact that
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Kirn Walter N.
Litman Mark A.
Michl Paul R.
Minnesota Mining and Manufacturing Company
Neville Thomas R.
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