Eastman-kodak Company

Brian P Cleary

Weimar W White

Roger L Lok

Gary G Kiehl

Yongcai Wang

Thomas B Brust

Dale E DeCann

Alton L Chitty

E Steven Brandt

An inkjet ink composition comprising: (a) water; (b) dispersed pigment particles; and (c) at least one humectant; wherein the pigment particles are present from about 4.5% by mass to about 10% by mass, and the pigment particles have a mass weighted mean Stoke's diameter of from about 35 nm to about 70 nm wherein the Stoke's diameter is determined by differential centrifugal sedimentation of the particles through a fluid in a disc centrifuge. The present invention employs specified sedimentation particle sizing criteria for selection of appropriate pigment particle sizes at high pigment concentrations to obtain improved ink performance. Further embodiments of the invention also demonstrate that the criticality of humectant types and levels employed in an ink can also become much more important at high pigment loading in order to obtain desired performance.

Pigment-based inkjet inks

Bis AU(I) sensitizers and their synthesis

Silver halide photographic elements containing bis Au(I) sensitizers

Stable and water soluble bis Au(I) complexes and their synthesis

A method of screening a water soluble gold complex for use as a sensitizer in a silver halide photographic element comprised of experimentally measuring the electrochemical potential of the gold complex and then determining if the electrochemical potential falls within a predetermined utility window.

Method for screening chemical sensitizers

Conversion of impure silver halide to ultra-pure silver metal

Preparation of ultra-pure silver metal

This invention relates to an organomercapto Au(I) complex having the formula ##STR1## wherein M is a cationic counterion;

This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organomercapto Au(I) complex having the formula

Photographic element containing water soluble bis Au(I) complexes

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Webster, NY, United States of America

Brian P Cleary