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Abstract

An erasable ink composition for use in writing with a marking pen which comprises an organic solvent, optionally a resin soluble in the solvent, a pigment dispersed in the solvent and additives, the improvement in the additives comprising: (a) a fatty acid monoester of an aliphatic alcohol wherein the fatty acid has not less than six carbons in amounts of about 0.5-20% by weight; (b) a fatty acid triglyceride in amounts of about 0.5-20% by weight; (c) a higher aliphatic hydrocarbon which is liquid at normal temperatures is amounts of about 0.2-5% by weight; and (d) a polyoxyethylene alkyl ether phosphoric acid ester in amounts of about 0.5-7% by weight; each based on the ink composition. The writings with the ink composition is erasable even after a long standing.

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First Claim