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US 2012/0232203 A1Published application
Ink for ink jet recording and ink set for ink jet recording
AssigneeSeiko Epson Corporation
InventorsKazumasa Tomura, Akira Mizutani, Shinichi Yamamoto
Life of this patent
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Abstract
The ink for ink jet recording includes a sparingly water-soluble alkanediol, a resin, and a coloring material, wherein the content of the coloring material is from 1 to 3% by mass based on the total mass of the ink, the surface tension is from 21 to 25 mN/m, and the thixotropic index (TI) represented by the following formula (1), as determined at a time point when its content becomes 40% by mass based on the total mass before the evaporation of the ink by the evaporation of the ink, is from 2 to 110: TI=η(1 s−1)/η(1000 s−1) (1).
Claims8
An ink for ink jet recording comprising:
- a sparingly water-soluble alkanediol;
- a resin;
- and
- a coloring material,
- wherein the content of the coloring material is from 1 to 3% by mass based on the total mass of the ink,
- the surface tension is from 21 to 25 mN/m,
- the solubility of the sparingly water-soluble alkanediol in water is less than 1.0 g/100 g of water, and
- the thixotropic index (TI) represented by the following formula (I),
- as determined at a time point when its content becomes 40% by mass based on the total mass before the evaporation of the ink by the evaporation of the ink, is from 2 to 110.
- TI=η(1 s−1)/η(1000 s−1) (1).
7 more elements
Dependencies are inferred from the claim text.