| 摘要 |
Provided is a water based ink having a metallic lustrous color for a ballpoint pen in which a metal powder pigment or aluminum powder and a complementary colorant (pigment or a colored water-insoluble polymer fine particles) are used as a colorant and further in addition to a thickener, a polar solvent and water, particularly a resin emulsion is used in combination to reduce the use amount of the thickener to thereby lower the viscosity. The ink is improved in follow-up property to be able to write continuously, develops a metallic color of a rainbow color on writing paper having a dark color and provides lines having water resistance and weatherability. The ink does not allow the metal powder and the pigment to settle and separate though the viscosity is low. |
