| 摘要 |
PCT No. PCT/JP97/03748 Sec. 371 Date Jul. 9, 1999 Sec. 102(e) Date Jul. 9, 1999 PCT Filed Oct. 17, 1997 PCT Pub. No. WO98/26014 PCT Pub. Date Jun. 18, 1998Provided 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.
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