WATER-BASED INK COMPOSITION ERASABLE WITH ERASER, WRITING IMPLEMENT USING THE SAME AND METHOD OF PRODUCING THE RUBBER-ERASABLE WATER-BASED INK COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a water-based ink composition erasable with eraser in which the handwriting written with the ink on the paper can readily be erased with eraser and resists peeling off with abrasion between paper sheets or with fingers and can retain the handwriting deeply and clearly with high stability. SOLUTION: The water-based ink composition contains capsule particles, water-soluble organic solvents and water. The capsule particles are composed of the surface layer in which a sticky polymer is used as at least a wall material for the capsules and of the core layer including inorganic or organic fine particles of 0.1-12 μm particle size distribution and coloring materials. In this case, the coloring materials are localized near the outer surface of the inorganic or organic fine particles. The capsule particles have the particle size distribution of 1-20 μm.