Ink Set And Recording Method

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Ink Set And Recording Method

This abstract first appeared for US patent application 20240254357 titled 'Ink Set And Recording Method

Original Abstract Submitted

an ink set includes a process liquid containing a flocculant; a first ink composition that contains a color material, is a thick ink, and is an aqueous ink; and a second ink composition that contains a color material, the content of the color material being smaller than that of the color material in the first ink composition, is a thin ink in a similar color to that of the first ink composition, and is an aqueous ink. when the second ink composition and a 5 mass % aqueous solution of calcium propionate are mixed at a mass ratio of “the former: the latter=10:1”, the viscosity increasing rate of the former is 2.2 times or more. the second ink composition satisfies one or more of the following requirements (1) and (2): (1) containing a pigment as the color material, wherein the pigment is dispersed in a dispersant resin, and the dispersant resin is a block copolymer including a block having a carboxy group and a block not having a carboxy group; and (2) containing one or more of maleic acid, acrylic, and urethane water-soluble resins that are soluble in a solvent component of the ink.