LITHOGRAPHIC PRINTING PLATE PRECURSOR AND METHOD OF USE

LITHOGRAPHIC PRINTING PLATE PRECURSOR AND METHOD OF USE

IR-sensitive lithographic printing plate precursors provide a stable print-out image using a unique IR-sensitive image-recording layer. The IR radiation-sensitive layer includes: (1) a free radical initiator composition with an electron-donating agent and one or more iodonium cations; (2) a free rad...

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Bibliographische Detailangaben
Hauptverfasser: SIMPSON, Christopher D, HUANG, Jianbing, WERNER, Saija, HANSMANN, Stefanie
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTINGSURFACES
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:IR-sensitive lithographic printing plate precursors provide a stable print-out image using a unique IR-sensitive image-recording layer. The IR radiation-sensitive layer includes: (1) a free radical initiator composition with an electron-donating agent and one or more iodonium cations; (2) a free radically polymerizable composition; and (3) a color-changing compound of Structure (I) having an indene ring in the conjugated chain between the aromatic terminal groups. The IR radiation-sensitive composition and layer also contains one or more borate ions such that the molar ratio of one or more borate ions to the one or more iodonium ions is at least 0.5:1. After IR imaging, these precursors exhibit desirable printout images both fresh and after dark storage. The precursors can be developed on-press.