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US 10,865,321 B2Granted
Oil-based inkjet ink
AssigneeRiso Kagaku Corporation
InventorsKazuyuki Ando, Shinichiro Shimura, Marie Morinaga, Hikaru Sugiura
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Abstract
An oil-based inkjet ink is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment contains an acidic carbon black having a pH of 2 to 6, the non-aqueous solvent contains a modified silicone oil having a surface tension of not more than 27 mN/m, and an amount of the modified silicone oil, relative to a total mass of the oil-based inkjet ink, is at least 15% by mass but not more than 80% by mass.
Claims4
An oil-based inkjet ink comprising a pigment, a pigment dispersant and a non-aqueous solvent, wherein
- the pigment comprises an acidic carbon black having a pH of 2 to 6,
- the non-aqueous solvent contains a modified silicone oil having a surface tension of not more than 27 mN/m at 23° C., and
- an amount of the modified silicone oil, relative to a total mass of the oil-based inkjet ink, is at least 15% by mass but not more than 80% by mass.
Dependencies are inferred from the claim text.