To provide water-based ink containing a pigment, but generating no clogging caused by drying of the ink at a nozzle tip and expressing high levels of discharge stability recently required to the ink.
The water-based ink comprises at least water, a water-soluble organic solvent and carbon black particles and contains the carbon black having ≥0.5 μm particle size. In the water-based ink, the rate of volume of the carbon black particles having ≥0.2 μm to <0.5 μm particle size is ≤0.3% based on the sum total volume of all carbon black particles in the ink, the number of carbon black particles having ≥0.5 μm to <5.0 μm particle size is ≤1.0×10
COPYRIGHT: (C)2008,JPO&INPIT
HAKAMATA SHINICHI
SUGAMA SADAYUKI
| JP2004010632A | 2004-01-15 | |||
| JPH1060327A | 1998-03-03 |
Katsuhiro Yoshida