Process for producing printing plate precursor
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United States of America Patent
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Issued Date -
Feb 19, 2004
app pub date -
Feb 25, 2003
filing date -
Feb 26, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides a process for the preparation of an infrared laser positive-working printing plate precursor for direct plate-making excellent in scratch resistance and discrimination between image area and non-image area, particularly in press life, which can make a printing plate directly from digital signal, particularly from computer, in which the process is provided for the preparation of a multi-layer printing plate precursor comprising a support, an underlayer and an image-recording layer, in this order, in which the underlayer comprises a water-insoluble and alkali-soluble resin, the image-recording layer comprises a water-insoluble and alkali-soluble resin and an infrared absorbent, and the image-recording layer increases the solubility in an alkaline aqueous solution upon irradiation with infrared laser beam, wherein the process comprises forming the image-recording layer with the use of a solvent that doesn't dissolve a component of the underlayer in an amount of 20% by weight or more as a solvent for image-recording layer coating solution
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