Inkjet ink set and inkjet recording apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorYasuko Takaori
Life of this patent
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Abstract
An inkjet ink set includes an undercoat liquid and one or more inkjet inks. The undercoat liquid contains first binder resin particles, a first aqueous medium, and a first surfactant. The one or more inkjet inks each contain a second pigment, second binder resin particles, a second aqueous medium, and a second surfactant. At a temperature of 20° C., a density ρ1 of the undercoat liquid and a density ρ2 of an inkjet ink of the one or more inkjet inks that has the highest density among those of the one or more inkjet inks satisfy a relationship represented by formula (1): ρ1−ρ2>0.05 g/cm3 . . . (1).
Claims13
An inkjet ink set comprising:
- an undercoat liquid;
- and
- one or more inkjet inks, wherein
- the undercoat liquid contains first binder resin particles, a first aqueous medium, and a first surfactant,
- the one or more inkjet inks each contain a second pigment, second binder resin particles, a second aqueous medium, and a second surfactant,
- at a temperature of 20° C., a density ρ1 of the undercoat liquid and a density ρ2 of an inkjet ink of the one or more inkjet ink that has highest density among those of the one or more inkjet inks satisfy a relationship represented by formula (1) below:
- ρ1
- -
- ρ2
- >
- 0.05
- g
- /
- cm
- 3
- ,
- (
- 1
- )
- the density ρ1 of the undercoat liquid is at least 1.10 g/cm3 and no greater than 1.20 g/cm3.
An inkjet ink set comprising:
- an undercoat liquid;
- and
- one or more inkjet inks, wherein
- the undercoat liquid contains first binder resin particles, a first aqueous medium, and a first surfactant,
- the one or more inkjet inks each contain a second pigment, second binder resin particles, a second aqueous medium, and a second surfactant,
- at a temperature of 20° C., a density ρ1 of the undercoat liquid and a density ρ2 of an inkjet ink of the one or more inkjet ink that has highest density among those of the one or more inkjet inks satisfy a relationship represented by formula (1) below:
- ρ1−ρ2>0.05 g/cm3 (1), and
- the undercoat liquid further contains a first pigment, a total percentage content of the first pigment and the first binder resin particles being at least 12.0% by mass and no greater than 20.0% by mass in the undercoat liquid, of the undercoat liquid does not contain the first pigment, the first binder resin particles having a percentage content of at least 10.0% by mass and no greater than 18.0% by mass in the undercoat liquid.
An inkjet ink set comprising:
- an undercoat liquid;
- and
- one or more inkjet inks, wherein
- the undercoat liquid contains first binder resin particles, a first aqueous medium, and a first surfactant,
- the one or more inkjet inks each contain a second pigment, second binder resin particles, a second aqueous medium, and a second surfactant,
- at a temperature of 20° C., a density ρ1 of the undercoat liquid and a density ρ2 of an inkjet ink of the one or more inkjet ink that has highest density among those of the one or more inkjet inks satisfy a relationship represented by formula (1) below:
- ρ1−ρ2>0.05 g/cm3 (1),
- the second binder resin particles include particles of at least one of urethane resin and polyester resin, and
- the second binder resin particles have a breaking elongation of no greater than 60%.
Dependencies are inferred from the claim text.