Process for reducing halations using lubricant in the course of irradiating and developing reproduction layers used for preparing printing plates

US4725526A · kind A · utility

Assignee

• Hoescht Aktiengesellschaft · DE

Inventors

• Werner Frass · Wiesbaden, DE
• Engelbert Pliefke · Wiesbaden, DE

Key dates

• Filing date: Aug 19, 1985
• Grant date: Feb 16, 1988
• Expiry date: Aug 19, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/151
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a process for reducing halations during the imagewise irradiation of a reproduction layer exposed through a planar image original, at least one lubricant either is contained in the layer or is interposed between the layer and the image original. Suitable lubricants include organic polysiloxanes, hydrocarbon polymers, polyaryl esters, and alkanoic acids or alkenoic acids having at least 9 carbon atoms. Excluded are lubricants comprising copolymers of dimethyl dichlorosilane, ethylene oxide and propylene oxide, provided they are located in the reproduction layer.