Offset printing method
AssigneeShuhou Co., Ltd.
InventorKouji Muraoka
Life of this patent
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Abstract
An offset printing method is provided that, while using an ink with a viscosity that allows for printing of a print image on a printing plate by an ink-jet process, enables a precise print image to be transferred from the printing plate to a print medium by use of a printing blanket. The offset printing method includes a printing-plate making step of printing an inked image on a printing plate by an ink-jet process, an ink drying step of evaporating a solvent contained in the ink of the inked image to increase the viscosity of the ink, a transferring step of transferring the inked image to the surface of a printing blanket, and a printing step of pressing the printing blanket against a print medium.
Claims12
An offset printing method comprising:
- a printing-plate making step of printing an inked image on a printing plate by an ink-jet process;
- an ink drying step of evaporating a solvent contained in an ink of the inked image to increase a viscosity of the ink;
- a transferring step of transferring the inked image to a surface of a printing blanket;
- and
- a printing step of pressing the printing blanket against a print medium, wherein the ink drying step includes a step of sending air directly toward the ink on the printing plate, and
- wherein in the printing-plate making step, the printing plate has a surface roughness ranging from 2 μm to 10 μm.
An offset printing method comprising:
- a printing-plate making step of printing an inked image on a printing plate by an ink-jet process;
- an ink drying step of evaporating a solvent contained in an ink of the inked image to increase a viscosity of the ink;
- a transferring step of transferring the inked image to a surface of a printing blanket;
- and
- a printing step of pressing the printing blanket against a print medium, wherein the ink drying step includes a step of sending air directly toward the ink on the printing plate, and
- wherein in the printing-plate making step, the ink has a viscosity ranging from 1 mP (poise) to 10 mP (poise).
An offset printing method comprising:
- a printing-plate making step of printing an inked image on a printing plate by an ink-jet process;
- an ink drying step of evaporating a solvent contained in an ink of the inked image to increase a viscosity of the ink;
- a transferring step of transferring the inked image to a surface of a printing blanket;
- and
- a printing step of pressing the printing blanket against a print medium,
- wherein the ink drying step includes a step of sending air directly toward the ink on the printing plate, and
- wherein in the printing-plate making step, the ink has a viscosity ranging from 300 P (poise) to 1000 P (poise).
Dependencies are inferred from the claim text.