WATER-BASE INK SET FOR INK JET RECORDING

• Main Authors: FUJIOKA MASAYA, KOBAYASHI NAOMICHI, GOTO KAZUMA, HIGASHIYAMA SHUNICHI, KOGA SHIGEMI, AOYAMA MICHIKO
• Format: Patent
• Language: English
• Published: 09.10.2002
• Edition: 7
• Subjects: 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

PROBLEM TO BE SOLVED: To provide a water-base ink set for ink jet recording which has a color balance attained by imparting a same light resistance to each of its color inks and gives a picture image maintaining the color balance even after discoloration. SOLUTION: This water-base ink set for ink jet recording at least comprises a yellow ink, a magenta ink, and a cyan ink. When the yellow ink, magenta ink, and cyan ink are each deposited on plain paper sheet and exposed to light with a wavelength of 300-400 nm for 30 h under a xenon lamp with a light radiation illuminance of 100 W/m , the changes in color of the yellow ink, magenta ink, and cyan ink represented by ΔEY, ΔEM, and ΔEC, respectively, satisfy the relations represented by the equations: |ΔEY-ΔEM|<=5, |ΔEM-ΔEC|<=5, and |ΔEC-ΔEY|<=5.