WATER-BASE WHITE PIGMENT INK FOR BALLPOINTS

摘要

Provided is a water based white color tone pigment ink for a ballpoint pen comprising titanium oxide, a complementary colorant comprising a pigment or a pseudo pigment obtained by dyeing resin particles with a dye, a resin emulsion, a thickener, water, a polar solvent and other additives, wherein the pigment has an average particle diameter of 100 nm or more; the pseudo pigment has an average particle diameter of 200 nm or more; the resin contained in the resin emulsion has an average particle diameter of 200 nm or more; and the ink has a viscosity of 500 mPa<•>s to 5000 mPa<•>s. Vivid drawn lines having a poster color tone can be obtained well even on writing paper having a dark hue. The ink is stable even in long term storage and excellent in a follow-up property and can write continuously.