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US 7,479,182 B2Granted
Black Ink for ink-jet printing
AssigneeKonica Minolta Holdings, Inc.
InventorsKatsunori Goi, Hirotaka Iijima, Hitoshi Morimoto
Life of this patent
Estimating the term…
Abstract
A black ink for ink-jet printing comprising: a) a carbon black pigment exhibiting a DBP oil absorption of not more than 150 cm3/100 g and a pH of more than 6, b) a solvent exhibiting a surface tension of 25-40 mN/m at 25 ° C. a viscosity of 1-50 mPa·s at 25 ° C. and a vapor pressure of not more than 133 Pa at 25 ° C. a solvent content of which being not less than 50 weight % and not more than 90 weight % based on the total ink weight, and c) water, the content of which being not less than 10 weight % and less than 45 weight %.
Claims9
A black ink for ink-jet printing comprising:
- a) a carbon black pigment exhibiting a DBP oil absorption of not more than 150 cm3/100 g and a pH of more than 6,
- b) a solvent exhibiting a surface tension of 25-40 mN/m at 25° C., a viscosity of 1-50 mPa·s at 25° C., and a vapor pressure of not more than 133 Pa at 25° C., a solvent content of which being not less than 50 weight % and not more than 90 weight % based on the total ink weight, and
- c) water, a water content of which being not less than 10 weight % and less than 45 weight %.
Dependencies are inferred from the claim text.