Kodak Polychrome Graphics, Gmbh

Carole-Anne Smith

Peter Andrew Bennett

Stuart Bayes

Peter Andrew Reath Bennett

David Stephen Riley

John Andrew Hearson

Peter A R Bennett

Kevin Barry Ray

Anthony Paul Kitson

Christopher David McCullough

James Laurence Mulligan

Alan Stanley Monk

Gareth Rhodri Parsons

Mark John Spowage

John David Riches

Richard David Hoare

Pattern formation

A positive working lithographic plate precursor comprising a support having a hydrophilic surface and a coating thereon comprising a positive working, photosensitive composition and an aryl alkyl polysiloxane. A method of preparing a positive working lithographic plate precursor comprising coating on a support having a hydrophilic surface a coating comprising, in admixture, a positive working photosensitive composition and an aryl alkyl polysiloxane.

Direct positive lithographic plate

A method for preparing a printing form and a method of printing are disclosed. A coating of a radiation sensitive ink on a lithographic support having a hydrophilic surface is imaged. The unexposed areas of the coating are removed to produce a printing form, which is used for printing. Preferably, the same radiation sensitive ink is used for printing as is used in the coating, and, preferably, the desired printing run length is predetermined and the thickness of the coating determined according to the desired run length.

Lithographic plates

There is described a method of preparing a positive working water-less lithographic plate which comprises a support having an oleophilic surface, there being coated on the support a mixture which comprises as one component an ink-repellant and water-repellant polymer or a mixture of such polymers or polymer precursors, and as the other essential component of the mixture an infra-red or heat sensitive composition selected from (a) an organic solvent soluble diazo compound and an infra-red absorbing compound, (b) a photopolymer and an infra-red absorbing dye, or (c) a mixture of a free-radically polymerisable ethylenically unsaturated compound or compounds together with either a photoinitiator which is infra-red sensitive or an initiator which is heat sensitive together with an infra-red absorbing compound, the ratio of ink-repellant polymer to infra-red or heat sensitive composition (a), (b) or (c) in the mixture being from 20-80 ink repellant polymer to 80-20 infra-red or heat sensitive composition by weight, imagewise acting on the coated mixture, developing the acted on mixture with the appropriate developing solution depending on the composition (a), (b) or (c) used, to remove the composition and the water-repellant polymer in the unacted on areas to reveal the oleophilic surface of the support in the unacted on areas of the plate and leaving the coated mixture in the acted on areas of the plate.

Water-less lithographic plates

Waterless lithographic plates

Production of water-less lithographic plates

Growing community of inventors

Edinburgh, United Kingdom

Carole-Anne Smith