Process for preparing a multicolored proof and radiation-sensitive recording material for use in this process

US5223374A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Dieter Mohr · Appenheim, DE
• Rudolf Zertani · Mainz, DE
• Juergen Mertes · Ingelheim am Rhein, DE
• Martin Benzing · Biebelnheim, DE

Key dates

• Filing date: Mar 18, 1992
• Grant date: Jun 29, 1993
• Expiry date: Mar 18, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F3/10
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present invention relates to a process for preparing a multicolored proof, using a radiation-sensitive recording material which comprises a temporary, sheet-shaped layer support, a thermally transferable layer containing a colorant in one primary color and a radiation-sensitive layer. The process comprises the steps of: a) exposing the recording material imagewise b)developing the exposed layer with an aqueous-alkaline solution to uncover the thermally transferable image areas, and c) contacting the coated side of the recording material with an image receptor and transferring the transferable image areas to the image receptor, with the application of heat and pressure, to produce a partial image in the first primary color. The above-described process steps are repeated at least once, using a radiation-sensitive recording material which contains a colorant in another primary color in its thermally transferable layer. Depending upon the respective embodiment, the process of the invention yields a proof which can be produced by a positive, a negative or a digital method, without distorting the image thus generated by interjacent layers.