Process for the preparation of planographic printing forms using laser beams

US4063949A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Fritz Uhlig · Wiesbaden, DE
• Ine Gramm · Wiesbaden, DE

Key dates

• Filing date: Feb 22, 1977
• Grant date: Dec 20, 1977
• Expiry date: Feb 22, 1997

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41C2210/262
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

This invention relates to an improvement in the process for the preparation of a planographic printing form in which a recording material comprising a support of anodically oxidized aluminum and a recording layer thereon is imagewise irradiated with a laser beam, thereby rendering the irradiated portions of the recording layer oleophilic and/or insoluble, and the non-irradiated portions of the recording layer are then removed, where necessary, by washing with a developer liquid, the improvement comprising an oxide layer on said support weighing at least 3 grams per square meter.