Eastman-kodak Company

Wai K Lam

Roger L Lok

Wayne A Bowman

Anthony Adin

Ramesh Jagannathan

Rajesh Vinodrai Mehta

Sang H Kim

Jerzy A Budz

Michael R Roberts

David Wallace Sandford

John E Keevert

Steven P Szatynski

Mark A Whitson

Richard E Beal

Carl R Preddy

Byron H Rubin

Color reversal photographic element containing emulsion sensitized with organomercapto AU(1) complexes and rapid sulfiding agents

A method is disclosed of manufacturing a radiation-sensitive tabular grain emulsion comprised of (a) providing in a stirred reaction vessel a host tabular grain emulsion containing greater than 50 mole percent bromide, based on silver, and a speed enhancing amount of iodide and (b) then introducing a silver salt solution into the stirred reaction vessel, wherein (1) the silver salt solution is introduced into the stirred reaction vessel at a rate sufficient to create a new grain population, (2) halting introduction of the silver salt solution for a time sufficient to allow the new grain population to be ripened out, and (3) repeating steps (1) and (2) from 3 to 20 times until silver introduced in steps (1) and (2) amounts to from 5 to 50 percent of total silver forming the radiation-sensitive tabular grain emulsion.

Robust method for the preparation of high bromide tabular grain emulsions

The present invention relates to a photographic element comprising a silver halide emulsion, the emulsion comprising silver halide grains which contain an alkynylamine dopant. The presence of the alkynylamine dopant imparts to the photographic element the advantageous characteristic of increased sensitivity.

Photographic elements containing alkynylamine dopants

A process for preparing a thin tabular grain silver halide emulsion comprised of silver halide grains which have a halide content of at least 50 mole percent bromide, wherein tabular grains of less than 0.15 micrometers in thickness and having an aspect ratio of greater than 8 account for greater than 50 percent of the total grain projected area, comprises the steps of nucleating the silver halide grains with a gelatino-peptizer or with the use of certain synthetic polymers that serve as effective nucleation peptizers and then growing the silver halide grains with the use of either a gelatino-peptizer or certain synthetic polymers that serve as effective growth peptizers.

Process for preparing a thin tabular grain silver halide emulsion

This invention provides a method of preparing a silver halide photographic emulsion which comprises adding to the silver halide emulsion before or during precipitation a non-labile chalcogen compound represented by Formula I:

Silver halide photographic emulsions precipitated in the presence of

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Webster, NY, United States of America

Wai K Lam