Minnesota Mining and Manufacturing Company

Terence William Baldock

John H Stibbard

John J Stofko, Jr

Ranjan C Patel

David Warner

Michael G Fisher

Donald J Newman

Ranjana C Patel

Darren Cooper

A colour sheet suitable for use in peel-apart colour imaging comprising a substrate bearing a layer of pigmented photopolymerizable material overcoated with a hydrophilic barrier layer and an outer layer of an adhesive.

Peel-apart proofing system comprising a hydrophilic barrier layer

A negative-acting, photothermographic material having a first layer comprising an amine compound and a second layer comprising an amine-reactive dye which undergoes a visible change when in reactive association with the amine compound. The amine compound and the amine-sensitive dye are in non-reactive association at ambient and moderate temperatures, but at elevated temperatures the two components are able to interact to produce a visible change in the heated areas of the material. The materials are particularly suitable for the preparation of overhead projector transparencies.

Negative-acting thermographic materials

Images can be formed on a receptor sheet by transfer of a dye image. The positive dye image is formed by bleaching of dye with an iodonium ion. The positive dye image is then transferred by sublimation or diffusion onto a receptor sheet.

Diffusion or sublimation transfer imaging system

A method for preparing nuclei for use in receptor sheets in the photographic silver salt diffusion transfer process, the method comprising preparing a controlled size suspension of metal salt particles and converting the particles, in suspension, to corresponding particles of free metal or metal sulfide.

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Harlow, United Kingdom

Terence William Baldock