On press developable printing plate precursor

US6420089B1 · kind B1 · utility

Assignee

• Kodak Polychrome Graphics Company Ltd. · US

Inventors

• Harald Baumann · Tuttlingen, DE
• Udo Dwars · Herzberg, DE

Key dates

• Filing date: May 11, 2000
• Grant date: Jul 16, 2002
• Expiry date: May 11, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/091
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present invention relates to a printing plate precursor with an overcoat, where the printing plate precursor is preferably developable on a printing press after imagewise exposure. The printing plate precursor comprises the following components:(a) at least one polymeric organic binder, soluble in water or in organic solvents having a water content of at least 50 wt.-% based on the total solvent content,(b) at least one radiation-absorbing component wherein the absorption maximum with the longest wavelength of the radiation-absorbing component of the overcoat is at or below 550 nm, the radiation-absorbing component absorbs in the range on the long wavelength side of the maximum of the absorption band of the photoactive system of the printing plate precursor and the difference between the absorption maximum with the longest wavelength of the radiation-absorbing component of the overcoat and the absorption maximum with the longest wavelength of the radiation-absorbing layer of the printing plate precursor is in the range of 5 to 200 nm, and(c) optionally at least one additive selected from an adhesive, a wetting agent, an inhibitor, a filler, a plasticizer, a flow improver, a thi…