INK COMPOSITION FOR INKJET RECORDING, INK SET, AND IMAGE RECORDING METHOD

• Main Author: KAERIYAMA, Atsushi
• Format: Patent
• Language: English; French; German
• Published: 02.03.2022
• 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

Provided is an ink composition for inkjet recording containing water, a pigment, and a water-soluble polymer having a carboxy group, in which the water-soluble polymer satisfies the following expression (1), and the ink composition for inkjet recording is used for recording an ink image on a recording medium to which a pretreatment liquid including at least one aggregating agent selected from the group consisting of acids, cationic polymers, and polyvalent metal salts is applied: 230mgKOH/g≤∑a×b≤750mgKOH a means an acid value of the water-soluble polymer, in terms of mgKOH/g, and b means a content of the water-soluble polymer with respect to a total amount of the ink composition, in terms of % by mass.