Other

Agfa Gevaert Nv

Agfa-gevaert

Allen Peter Gates

Philip John Watkiss

John Michael Kitteridge

Roland Robinson

Andreas Elsaesser

Fredrick Claus Zumsteg, Jr

Steffen Denzinger

Jas Pal Singh Badyal

Michael Doerr

Guenther Hultzsch

Alastair Lamont Gardner

Jonathan William Goodin

Malcolm James Mallison

Stephen Bernard Doyle

Jacek Paul Obuchowicz

Jonathan Mark Crowther

Andrew Ernest Matthews

A method for metallising solid substrates involves the use of non-equilibrium plasma treatment of a supported metal precursor layer. This technique can be used to make pure metal or alloy coatings. An oxidising plasma pre-treatment step of the supported metal precursor layer, or the incorporation of a plasma polymer coupling layer prior to metallisation, can result in improved adhesion. The method can be applied to the preparation of lithographic printing plate precursors.

Method for forming a metallic film using non-isothermal plasma

The invention relates to a recording material for the production of an offset printing plate, having a substrate on whose front a photosensitive image layer is present and on whose back a layer of an organic polymeric material having a glass transition temperature T,of 45&deg; C. or more is present. The photosensitive image layer, or any top layer present thereon, has a pigment layer formed thereon.

Pigmented recording material having a backing coating for the production of offset printing plates

A lithographic printing plate precursor comprises a grained and anodised aluminium substrate coated with a metallic layer, preferably a silver layer, on top of which is applied a layer of an oleophilic resin. Imagewise exposure of the precursor by means of a high intensity laser beam allows for the direct provision of press ready plates showing increased cleanliness in background areas and providing excellent start-up properties on press, high image quality and improved press durability, without the requirement for the use of intermediate film and developer chemistry, or the need for any post-exposure processing. Lower levels of metal deposition on the substrate surface result in the plate precursors showing enhanced sensitivity on exposure, whereupon removal of the metallic layer occurs in the exposed areas.

Heat sensitive plate precursor

The invention provides a lithographic printing plate precursor comprising a grained and anodized aluminium substrate having coated thereon a silver halide emulsion layer, the back surface of said substrate being coated with an inert coating which does not chemically or physically interact with an adjacent silver halide layer when two plates are placed in front to back contact. Fogging of the silver halide layer is avoided and the use of the back coating eliminates the requirement for the use of tissue interleaving when wrapping and packing the lithographic printing plate precursors.

Presensitized printing plates

A method of image formation which comprises (a) providing a radiation sensitive plate comprising a substrate and a coating containing a heat softenable disperse phase, an aqueous soluble or swellable continuous phase and a radiation absorbing substance, (b) image-wise exposing the plate to at least partially coalesce the particles of the disperse phase in the image areas, (c) developing the image-wise exposed plate to remove the coating in the unexposed areas, and (d) heating the developed plate or subjecting it to irradiation to effect insolubilization of the image. Good quality images of high durability are obtained.

Method of forming an image in a printing plate

Laminates of aluminum and plastic form the substrate of printing plate precursors that are suitable for imaging in conventional roll-fed imagesetters or phototypesetters.

Image formation

Growing community of inventors

North Yorkshire, United Kingdom

Allen Peter Gates