AQUEOUS INK SET FOR INKJET RECORDING, TREATMENT AGENT, AND CARTRIDGE

• Main Author: TAGA YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 09.05.2016
• 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 an aqueous ink set for inkjet recording, which can further increase an optical density (OD value) and a chroma.SOLUTION: The aqueous ink set for inkjet recording comprises an aqueous ink for inkjet recording and a treatment agent. The aqueous ink comprises a colorant and water: the colorant comprises a self-dispersion type pigment modified with a phosphate group; and the treatment agent comprises at least either dextran or its derivative. By combining the treatment agent comprising at least either dextran or its derivative with the aqueous ink comprising a self-dispersion pigment modified with a phosphate group, an optical density (OD value) and a chroma can be further increased.SELECTED DRAWING: None 【課題】 光学濃度（ＯＤ値）及び彩度をさらに向上可能なインクジェット記録用水性インクセットを提供する。【解決手段】 インクジェット記録用水性インク及び処理剤を含むインクジェット記録用水性インクセットであって、前記水性インクは、着色剤及び水を含み、前記着色剤は、リン酸基により修飾された自己分散型顔料を含み、前記処理剤は、デキストラン及びその誘導体の少なくとも一方を含むことを特徴とする。デキストラン及びその誘導体の少なくとも一方を含む処理剤を、リン酸基により修飾された自己分散型顔料を含む水性インクと組み合わせたことで、光学濃度（ＯＤ値）及び彩度をさらに向上可能である。【選択図】 なし