Process for the production of a multicolored image and photosensitive material for carrying out this process

US5478694A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Karin Maerz · Mainz, DE
• Ine Gramm · Wiesbaden, DE
• Manfred Hilger · Konz, DE
• Dieter Mohr · Appenheim, DE
• Stephan J. W. Platzer · Califon, US

Key dates

• Filing date: May 17, 1993
• Grant date: Dec 26, 1995
• Expiry date: May 17, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F3/102
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to a photosensitive material for the production of color proofing films for multicolor printing comprising: PA1 A) a transparent, flexible film support, PA1 B) a photopolymerizable layer containing: PA2 B1) a polymeric binder, PA2 B2) a free radical-polymerizable compound, PA2 B3) a compound which is capable of initiating the polymerization of (B2) on exposure to actinic light, and PA2 B4) a dye or colored pigment in a primary color of multicolor printing, and PA1 C) a thermoplastic adhesive layer on the photosensitive layer, which contains at least about 1.5% by weight of a water-soluble, colorless, low-molecular-weight salt whose aqueous solution is not highly acidic. The material is processed by lamination onto an image-receiving material, exposure and peeling apart of the film support and the image-receiving material, the unexposed areas of the layer and the adhesive layer remaining on the image-receiving material. The addition of the salt to the adhesive layer substantially reduces the adhesion between this layer and the exposed areas of the photopolymerizable layer.