Eastman-kodak Company

Rene Ullrich

Celin M Savariar-Hauck

Alan Stanley Monk

Manuel Klamt

An imaged and developed element, such as a lithographic printing plate, is provided by infrared radiation imaging of a positive-working imagable element having inner and outer imagable layers. One or both layers contain a polymeric binder having pendant 1H-tetrazole groups. The imaged element is developed with a single processing solution having a pH of from about 5 to about 11 to remove predominantly only the exposed regions and to provide a protective layer over the imaged surface.

Methods for imaging and processing positive-working imageable elements

Radiation-sensitive negative working element comprising (a) a substrate with a hydrophilic surface and (b) a layer on the hydrophilic surface of the substrate, wherein said layer comprises a modified polymer obtainable by reacting (i) a polymer with &#x2014;COOH, &#x2014;SO3H, &#x2014;P03H2 and/or &#x2014;PO4H2 in the side chains, wherein the polymer is soluble in aqueous alkaline solutions and the solubility is not changed by IR radiation, and (ii) a salt with an inorganic or organic cation, wherein the modified polymer is soluble in aqueous alkaline solutions and the solubility is not changed by IR radiation, said layer being soluble in aqueous alkaline developer, but is rendered insoluble in aqueous alkaline developer by IR radiation.

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Munich, Georgia

Rene Ullrich