Processes for producing pigment dispersion and ink composition
AssigneeSeiko Epson Corporation
InventorsTsuyoshi Sano, Kiyohiko Takemoto, Kazuaki Watanabe
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Abstract
A process for producing a pigment dispersion is disclosed. This process comprises the steps of: providing a mixture consisting essentially of a pigment, a dispersant, a polysiloxane surfactant and/or an alkanediol, a polyhydric alcohol, and water; and dispersing the ingredients of the mixture in one another. A process for producing an ink composition is also disclosed wherein the above pigment dispersion is mixed with a member selected from the group consisting of water, a surfactant, a wetting agent, a pH adjustor, and mixtures thereof. This ink composition can realize good image quality.
Claims23
A process for producing a pigment dispersion, comprising the steps of:
- providing a mixture consisting essentially of a pigment, a dispersant, a polysiloxane surfactant and/or an alkanediol, a polyhydric alcohol, and water;
- and
- dispersing the mixture.
A process for producing an ink composition, comprising the steps of:
- providing a mixture consisting essentially of a pigment, a dispersant, a polysiloxane surfactant and/or an alkanediol, a polyhydric alcohol, and water;
- dispersing the mixture to prepare a pigment dispersion;
- and
- mixing the pigment dispersion with a member selected from the group consisting of water, a surfactant, a wetting agent, a pH adjustor, and mixtures thereof.
Dependencies are inferred from the claim text.