| 摘要 |
PROBLEM TO BE SOLVED: To obtain an aqueous ink composition for an erasable pressurized ball-point pen which performs writing by applying pressure to an ink and compulsorily discharging it and can be erased with an eraser. SOLUTION: This aqueous ink composition for the erasable pressurized ball-point pen contains a colorant comprising at least a pigment, a film-forming agent having an average molecular weight of 200,000-3,000,000, a plasticizer and water. Preferably, the film-forming agent is at least one selected from the group consisting of a polyethylene oxide and an ethylene oxide/propylene oxide co-polyaddition product. The composition is excellent in ink dischargeability, writing condition and erasability of a drawn line. COPYRIGHT: (C)2005,JPO&NCIPI |
