Process for producing relief copies in light hardenable materials with ultrasonic treatment

US4447510A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Werner Frass · Wiesbaden, DE
• Klaus Horn · Dortmund, DE

Key dates

• Filing date: May 7, 1982
• Grant date: May 8, 1984
• Expiry date: May 7, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/38
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A process for producing relief copies wherein the light-hardenable layer of a light-hardenable copying material, which contains a photopolymerizable mixture, a photodimerizable polymeric compound or a diazonium salt polycondensation product, is exposed to a light image, the exposed layer is subjected to a brief ultrasonic treatment, and the unexposed areas of the layer are thereafter washed away by means of a developer. As a result of the ultrasonic treatment, shorter exposure times may be used and better in-depth hardening of the layer may be achieved.