WATER-BASED INK COMPOSITION FOR MARKING PEN AND DIRECT LIQUID-TYPE MARKING PEN

摘要

PROBLEM TO BE SOLVED: To provide a water-based ink composition for marking pen preventing sedimentation of inorganic pigment and having good ink discharging, and a direct liquid-type marking pen therewith.;SOLUTION: A water-based ink composition for marking pen contains water, inorganic pigment, fermented cellulose and high molecular materials except the fermented cellulose, and the viscosity measured using E-type viscometer under a condition that 25°C, 0.8°×R24 rotor, and 6 rpm is 15-50 mPa s.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT