INK-JET PLATEMAKING METHOD
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United States of America Patent
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Issued Date -
Jun 16, 2011
app pub date -
Jun 9, 2009
filing date -
Aug 19, 2008
priority date (Note) -
Abandoned
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Abstract
An ink-jet platemaking method is provided which takes advantage of the high convenience and high productivity characteristic of platemaking by ink-jet printing and which mitigates or improves the liquid gathering caused by droplet coalescence and printing durability, which have been problematic in platemaking by ink-jet printing. The ink-jet platemaking method comprises: using an ink for platemaking comprising water, one or more water-soluble organic solvents, and fine resin particles; adhering the ink for platemaking to a heated printing plate material; and volatilizing the solvent contained in the platemaking ink to dry the ink and thereby form an image. The ink-jet platemaking method is characterized in that the fine resin particles have a minimum film-forming temperature (MFT (water)) of 40° C. or higher, the ink for platemaking contains a water-soluble organic solvent (A) which lowers the MFT of the fine resin particles by 5° C. or more, the water-soluble organic solvent (A) accounts for 20% or more of all water-soluble organic solvents contained in the ink, and the water-soluble organic solvent (A) has a boiling point of 180-300° C.
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