Water-based ink set for ink-jet recording and ink-jet recording method
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsNarumi Koga, Masaya Fujioka, Tomoyo Hamajima, Narumi Kawai
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Abstract
The water-based ink set for ink-jet recording includes a magenta ink and a red ink with dynamic surface tensions thereof satisfying the following inequalities (IM), (IIM), (IIIM) and (IVM) σ30M≦about 49 mN/m (IM) σ30M+σ30R≦about 100 mN/m (IIM) wherein σ30M is the dynamic surface tension of the magenta ink at a lifetime of 30 ms and σ30R is the dynamic surface tension of the red ink at a lifetime of 30 ms, σ1000R≧about 36 mN/m (IIIM) σ1000M+σ1000R≧about 70 mN/m (IVM) wherein σ1000M is the dynamic surface tension of the magenta ink at a lifetime of 1,000 ms and σ1000R is the dynamic surface tension of the red ink at a lifetime of 1,000 ms).
Claims16
A water-based ink set for ink-jet recording comprising a magenta ink and a red ink, wherein dynamic surface tensions of the magenta ink and the red ink as determined by a maximum bubble pressure method at a measurement temperature of 25° C. satisfy the following inequalities (IM), (IIM), (IIIM) and (IVM)
- σ30M≦about 49 mN/m (IM)
- σ30M+σ30R≦about 100 mN/m (IIM)
- wherein σ30M is dynamic surface tension of the magenta ink at a lifetime of 30 ms and σ30R is the dynamic surface tension of the red ink at a lifetime of 30 ms,
- σ1000R≧about 36 mN/m (IIIM)
- σ1000M+σ10000R≧about 70 mN/m (IVM)
- wherein σ1000M is dynamic surface tension of the magenta ink at a lifetime of 1,000 ms and σ1000R is the dynamic surface tension of the red ink at a lifetime of 1,000 ms.
A method of ink-jet recording comprising:
- applying a water-based ink set to a recording material using an ink-jet printer,
- wherein the water-based ink set comprises:
- a magenta ink and a red ink, wherein dynamic surface tensions of the magenta ink and the red ink as determined by a maximum bubble pressure method at a measurement temperature of 25° C. satisfy the following inequalities (IM), (IIM), (IIIM) and (IVM)
- σ30M≦about 49 mN/m (IM)
- σ30M+σ30R≦about 100 mN/m (IIM)
- wherein σ30M is dynamic surface tension of the magenta ink at a lifetime of 30 ms and σ30R is the dynamic surface tension of the red ink at a lifetime of 30 ms,
- σ1000R≧about 36 mN/m (IIIM)
- σ1000M+σ10000R≧about 70 mN/m (IVM)
- wherein σ1000M is dynamic surface tension of the magenta ink at a lifetime of 1,000 ms and σ1000R is the dynamic surface tension of the red ink at a lifetime of 1,000 ms.
Dependencies are inferred from the claim text.