Patent 7173077 was granted and assigned to Sakura Color Products Corporation on February, 2007 by the United States Patent and Trademark Office.
An aqueous glittering ink composition whose viscosity ranges from about 1,000 to about 10,000 mPa·s, (measured by an ELD-type viscometer: 3° R 14 cone, 0.5 rpm, at the temperature of 20° C.) comprisinga. aluminum powder pigments whose median diameter is not less than about 15 μm compounded with oleic acid and/or stearic acid;b. synthetic resin emulsions selected from acryl based synthetic resin emulsions, styrene-acryl based synthetic resin emulsions and vinyl acetate based synthetic resin emulsions;c. polysaccharide selected from whelan gum, succinoglycan, and rhamsan gum;d. water-soluble organic solvent; ande. colored pigment.