| 摘要 |
<p>PURPOSE:The titled composition, having improved ink extrudability even with a minimum amount of a solvent for improving the trace drying property, and prepare by adding earthy graphite to an ink for a ball point pen consisting of a colorant, e.g. a dye, a high polymer and a solvent. CONSTITUTION:A composition prepared by adding preferably 1-15wt% earthy graphite to an ink for a ball point pen consisting of a colorant, e.g. a dye or pigment, a high polymer, e.g. ketone resin, and a solvent for the high polymer, e.g. benzyl alcohol. In the case of the dye used as the colorant, the earthy graphite is added to a dissolved ink and mixed and dispersed by a three-roll mill. In the case of the pigment used as the colorant, the pigment and the earthy graphite are kneaded with the high polymer and dispersed and then dissolved in the solvent. USE:An open type ball point pen of ordinary pressure and a closed ball point pen of high pressure structure.</p> |
