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Patent Searching and Data


Title:
IMPROVED METHOD FOR BUMP EXPOSING RELIEF IMAGE PRINTING PLATES
Document Type and Number:
WIPO Patent Application WO2006019450
Kind Code:
A3
Abstract:
A process of producing a relief image printing plate, the process comprising the steps of providing a photosensitive printing element, quenching dissolved oxygen in the photosensitive resin layer by pre-exposing the photosensitive layer to one or more sources of actinic radiation, wherein the range of wavelengths spanned by the one or more sources of actinic radiation differs by no more than about 20 nm, and imagewise exposing the photosensitive resin layer to actinic radiation to crosslink and cure the photosensitive resin layer. The photosensitive composition typically comprises at least one photoinitiator that is present in the photosensitive composition in an amount sufficient to provide an optical density in the photosensitive composition of between about 0.05 and 0.43 at a wavelength used to pre-expose the photosensitive composition.

Inventors:
ROBERTS DAVID H (US)
MUELLER GREGORY E (US)
Application Number:
PCT/US2005/017023
Publication Date:
November 30, 2006
Filing Date:
May 16, 2005
Export Citation:
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Assignee:
MACDERMID PRINTING SOLUTIONS (US)
International Classes:
G03C1/76; G03C1/492; G03C1/494; G03C1/725; G03C1/73; G03C1/735; G03F7/00; G03F7/26
Foreign References:
EP0460919A21991-12-11
US20040234886A12004-11-25
US5330882A1994-07-19
US3877939A1975-04-15
Other References:
See also references of EP 1769285A4
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