Water base ink for ink-jet recording

• Main Authors: SUGIMOTO JUNICHIRO, FUJIOKA MASAYA, HIGASHIYAMA SHUNICHI, GOTO KAZUMA, KOGA NARUMI, OKUDA SATOSHI
• Format: Patent
• Language: Chinese; English
• Published: 05.05.2010
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; 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; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

A water base ink for ink-jet recording contains 0.1 % by weight to 4.0 % by weight of C.I. Direct Yellow 132; not less than 0.5 % by weight of glycol ether having a melting point of not more than -45DEG C; and a water-soluble organic solvent in which a solubility of C.I. Direct Yellow 132 at 20 DEG C is not less than 5%. The ink satisfies 0.2 <= B/A and 3 <= C/A. B/A represents a weight ratio ofthe glycol ether to the C.I. Direct Yellow 132 contained in the ink, and C/A represents a weight ratio of the water-soluble organic solvent to the C.I. Direct Yellow 132 contained in the ink. The stability in long-term storage after the evaporation of water or at low temperatures can be obtained even when C.I. Direct Yellow 132 is used in the water-base ink for the ink-jet recording.