Eastman-kodak Company

Joseph H Ambro

Derek D Chapman

Linda A Kaszczuk

Steven Evans

Lawrence E Contois

Robert V Barry

A cyan dye-donor element for thermal dye transfer comprising a support having thereon a dye layer comprising a mixture of cyan dyes dispersed in a polymeric binder, at least one of the cyan dyes having the formula: ##STR1## and at least one of the other of the dyes having the formula: ##STR2##

Cyan dye mixtures for thermal color proofing

A magenta dye-donor element for thermal dye transfer comprises a support having thereon a dye layer comprising a mixture of magenta dyes dispersed in a polymeric binder, at least one of the magenta dyes having the formula: ##STR1## and at least another of the magenta dyes having the formula: ##STR2##

Magenta dye mixture for thermal color proofing

A technique for use in a direct digital color proofing (DDCP) system (500) for printing a 'modelling' color(s) in a halftone color proof image such that the modelling color simulates a ('special') color that does not lie within a gamut of colors reproducible through only primary color (e.g. cyan, magenta, yellow and black) halftone printing. Specifically, a wide range of such modelling colors can be produced by independently and appropriately setting dot size, particularly in combination with solid area density, for the halftone dots (110, 120, 130, 140) produced for different primary colors and then printing the resulting dots on an overlaid dot-on-dot basis with proper registration. Appropriate dot gain and density look-up tables (230, 720; 240, 940) are respectively used to transform continuous tone separation values and bit-mapped data to vary dot size and solid area density of these halftone dots for each such primary color prior to printing these dots using a proofing engine. A unique set of tables is used to produce each different modelling color.

Technique for generating additional colors in a halftone color image

A cyan dye-donor element for thermal dye transfer comprising a yellow dye and a mixture of cyan dyes dispersed in a polymeric binder, at least one of the cyan dyes having the formula: ##STR1##

Mixture of dyes for cyan dye donor for thermal color proofing

Electrophotographic color proofs of half-tone dot pattern images are made which closely simulate the dot gain of prints made with lithographic plates and liquid inks. In forming the color proof, a thin transparent plastic sheet having on one side an electrophotographic toner dot pattern image is laminated to a reflective support with the toner image side in contact with the support. A thicker transparent plastic sheet is laminated to the other side of the thin sheet. The resulting color proof comprising a toner dot pattern on a reflective support and covered by a thin transparent layer and a thicker transparent layer has an apparent increase in dot size which simulates that of a press print.

Growing community of inventors

Rochester, NY, United States of America

Joseph H Ambro