Ink composition, ink set, recording process and recorded image
AssigneeSeiko Epson Corporation
InventorShuichi Koganehira
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Abstract
Provided is an ink composition containing a pigment, an aqueous medium, a copolymer resin of a hydrophobic monomer and a hydrophilic monomer, and a urethane resin, wherein the weight ratio of the copolymer resin to the urethane resin (copolymer resin/urethane resin) being from 1/2 to 2/1, and wherein the pigment having an area average particle diameter of from 150 to 350 nm. Also disclosed are a production process of the ink composition, an ink set and a recording process using the ink composition, and a recorded image formed by the recording process.
Claims16
An ink composition comprising a pigment, an aqueous medium, a copolymer resin of a hydrophobic monomer and a hydrophilic monomer, and a urethane resin,
- wherein a weight ratio of the copolymer resin to the urethane resin (copolymer resin/urethane resin) is from 1/2 to 2/1, and
- wherein the pigment has an area average particle diameter of from 150 to 350 nm.
A process for producing an ink composition comprising:
- a pre-treating step of providing a pigment having a volume average particle diameter of from 350 to 600 nm;
- a step of dispersing the pigment by adding a copolymer resin of a hydrophobic monomer and a hydrophilic monomer;
- and
- a post-treating step of crosslinking the copolymer resin by adding a urethane resin and a crosslinking agent.
Dependencies are inferred from the claim text.