| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink composition for luminous maker capable of easily dispersing the pigment even when the composition is allowed to stand for a time in a state where the pigment is separated and settled, and excellent in re-dispersibility by compounding a luminous pigment, an alicyclic organic solvent, a solvent-soluble resin and a plastic pigment. SOLUTION: This ink composition is composed of at least (A) a luminous pigment such as ZnS:Cu, etc., (the average particle diameter is preferably 0.5-20μm) as a coloring agent preferably in an amount of 15-45 wt.% (based on the total of the composition), (B) an alicyclic organic solvent such as ethylcyclohexane or methylcyclohexane preferably in an amount of 50-75 wt.%, (C) a resin such as a terpene resin which is soluble in the component B preferably in an amount of 8-20 wt.% and (D) a plastic pigment such as polymethylmethacrylate or a crosslinked acrylic resin. Further, the use of the component D is preferably in the range of 1/2, to 1/10 based on the compounding quantity of the component A.</p> |
