| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide polymer fine particle having fresh color and excellent durability without bleeding and suitable for use such as water base ink for writing and ink for ink jet. SOLUTION: This polymer particle is obtained by bonding a dye having a functional group bondable to a polymer fine particle in a molecule to a urethane-based polymer fine particle having 5-700nm average particle diameter, <=1,000nm maximum particle diameter and a particle size distribution of >=1.5m- value of a shape parameter in applying a Weibull probability distribution and having a group formable of an ion pair insoluble in an organic solvent.</p> |
