| 摘要 |
PURPOSE: Provided is a rubber-erasable aqueous ink for a writing material composition which, when heated, exhibits a permanent fixability such that writing cannot be erased even when vigorously rubbed. CONSTITUTION: A rubber-erasable aqueous ink for a writing material composition contains water, a water-soluble polar solvent, and a particulate adhesive colored resin. The particulate adhesive colored resin contains a pigment and an adhesive resin which is adhesive on at least a part of a surface thereof. The particulate adhesive colored resin has a particle diameter distribution such that the amount of particles having a particle diameter of from 2 micrometer to 20 micrometer is not less than 70% by weight of all the particles.
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