Ink jet recording ink and ink jet recording apparatus
First Claim
1. An ink composition comprising a pigment, a water-soluble organic solvent, a surfactant and water wherein the pigment is dispersible and/or soluble in water without a dispersant and has an average particle diameter of 50 to 200 nm, and wherein the surfactant is an acetylene glycol surfactant.
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Abstract
An ink composition is provided which can realize a good image having no significant featuring or bleeding on various recording media, especially even on plain paper, recycled paper, and recording media having thereon a gloss layer. The ink composition comprises a pigment, a water-soluble organic solvent, a surfactant, and water, wherein the pigment is dispersible and/or soluble in water without a dispersant and the surfactant is an acetylene glycol surfactant. This ink composition can realize an image having no significant feathering or bleeding on various recording media.
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Citations
23 Claims
- 1. An ink composition comprising a pigment, a water-soluble organic solvent, a surfactant and water wherein the pigment is dispersible and/or soluble in water without a dispersant and has an average particle diameter of 50 to 200 nm, and wherein the surfactant is an acetylene glycol surfactant.
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23. An ink composition comprising a pigment in an amount of 2-10% by weight, a water-soluble organic solvent in an amount of 0.1-60% by weight, a surfactant in an amount of 0.3-2% by weight, and water, wherein the pigment is dispersible and/or soluble in water without a dispersant and the surfactant is an acetylene glycol surfactant, and wherein the pigment has on its surface at least one functional group selected from carbonyl, carboxyl, hydroxyl, and sulfone groups, or a salt thereof, thereby permitting the pigment to be dispersible and/or soluble in water without a dispersant.
Specification