INK-JET INK AND METHOD FOR FORMING IMAGE

This ink-jet ink (hereinafter, referred to as "ink") comprises an aqueous solvent, a pigment, and a thixotropic agent, and is characterized by having a viscosity at 25°C of 15 mPa·s or lower at a shear rate of 1,000 (1/s) and having a viscosity at 25°C of 150 mPa·s or higher at a shear rat...

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Bibliographische Detailangaben
Hauptverfasser:	MAEDA, Akio, OMATA, Takenori
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS CORRECTION OF TYPOGRAPHICAL ERRORS DYES FILLING PASTES i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INKS LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	This ink-jet ink (hereinafter, referred to as "ink") comprises an aqueous solvent, a pigment, and a thixotropic agent, and is characterized by having a viscosity at 25°C of 15 mPa·s or lower at a shear rate of 1,000 (1/s) and having a viscosity at 25°C of 150 mPa·s or higher at a shear rate of 1 (1/s) in a state in which the aqueous solvent has been removed therefrom so that the mass of the ink is 80% of the initial mass. This method for forming an image includes an ink delivery step in which droplets of an ink are ejected from an ink-jet head equipped with an ink circulation mechanism and are delivered to a base, and is characterized in that the ink comprises an aqueous solvent, a pigment, and a thixotropic agent, the ink is circulated so that the ink within the ink-jet head has a viscosity of 15 mPa·s or lower, and the ink delivery step is conducted so that the droplets at the time of delivery to the base or immediately after the delivery have a loss in mass from the ink of 20% or less and have a viscosity of 150 mPa·s or higher.