| 摘要 |
<p>A water-based recording ink comprising water, pigment, a water-soluble homopolymer, and a copolymer having both hydrophobic and hydrophilic parts. This ink can give printed characters excellent in density, lightfasteness and water resistance. Further it has various characteristics required of an ink for ink jet printing, such as prevention of clogging of minute delivery nozzles, excellence in the scratching resistance and tackfreeness of a print, freeness from the aggregation and sedimentation of solid matters such as pigment particles and from a change in the properties even when stored for long at various temperatures, and the ability of the pigment particles, even if aggregated, to disperse again by agitation or the addition of fresh solvent.</p> |
