Minnesota Mining and Manufacturing Company

Keith A Penfound

Jonathan P Kitchin

Stephen R Powers

Peter J Finn

Michael G Fisher

Ronald W Burrows

Bernard A Lea

Nicholas E Grzeskowiak

High contrast negative acting silver halide emulsions suitable for laser scanning applications comprising a Group VIII metal compound and one or more spectrally sensitizing dyes of the formula ##STR1## The emulsions have good long term stability and good sensitivity.

Silver halide photographic materials

Photographic elements comprising a negative working silver halide emulsion containing high intensity reciprocity failure reducing amounts of dopant comprising both ruthenium and iridium ions.

High contrast scanner photographic elements employing ruthenium and

A process for producing a continuous tone color image comprising providing a light sensitive photographic element comprising a substrate bearing three imaging media coated thereon, said imaging media comprising:

Continuous tone color imaging using laser or light emitting diode sources

A radiation-sensitive element for half tone color proofing adapted to be exposed by scanning with four independently modulated sources of radiation emitting at different wavelengths within the range 550 to 900 nm, the element comprising a substrate bearing at least four separate imaging media coated thereon, said imaging media including:

Photographic color proofing apparatus

Photographic materials and color proofing system

Photothermographic emulsions display enhanced spectral sensitization when the silver halide grains are formed in the presence of one or more spectral sensitizing dyes.

Growing community of inventors

Saffron Walden, United Kingdom

Keith A Penfound