Patent ID: 8123845

Claim:
A dual color ink composition which comprises: (a) at least one pigment selected from a pearlescent pigment and a metal powder pigment; (b) water; (c) at least one water-soluble organic solvent selected from alcohols, glycols and glycol ethers, any of which have a branched hydrophobic group; (d) a water-soluble dye; and (e) at least one selected from urea, ethyleneurea, methylurea and dimethylurea in an amount in total of 15-20% by weight; and (f) hydroxpropyl starch as a water-soluble fixing agent, wherein the hydroxypropyl starch has an amylopectin backbone content of 90% or more, and a degree of hydroxyproplation in a range of 3 to 10%.