DEVELOPING METHOD OF PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE

PROBLEM TO BE SOLVED: To improve printing contamination which is a failure caused by an ink of a ball-point pen remaining on the plate, by specifying the ratio of the period for washing to the period after completion of development till initiation of washing. SOLUTION: A photosensitive lithographic...

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Bibliographic Details
Main Authors SUGI YASUHISA, HIRAI YOKO
Format Patent
LanguageEnglish
Published 22.05.1998
Edition6
Subjects
APPARATUS SPECIALLY ADAPTED THEREFOR
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
MATERIALS THEREFOR
ORIGINALS THEREFOR
PHOTOGRAPHY
PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To improve printing contamination which is a failure caused by an ink of a ball-point pen remaining on the plate, by specifying the ratio of the period for washing to the period after completion of development till initiation of washing. SOLUTION: A photosensitive lithographic printing plate is treated in automatic developing machines 1 to 3 each by passing through a developing zone A, a carrying zone B from the developing zone to a washing zone, a washing zone C, a carrying zone D from the washing zone to a coating zone of a gum liquid, a containing zone E of a gum liquid, a carrying zone F from the coating zone of a gum liquid to a drying zone, and a drying zone G. In this automatic developing machine, washing time W means the period necessary for the top of the developed lithographic printing plate to pass through the washing zone C, and carrying time D means the period necessary for the top of the developed lithographic printing plate to pass through the carrying zone B from the developing zone to the washing zone. The ratio W/D of the washing time W to carrying time D is controlled to >=3.
Bibliography:Application Number: JP19970242659