Patent ID: 7303616
Filing Date: 2007-12-04
Classification: C09D

Abstract:
1. An ink composition, characterized by containing water, metal phthalocyanine cyan dye, and aromatic compound having a sulfo group represented by undermentioned general formula (1) and/or (2): wherein M 1 represents a lithium counter ion forming a salt, X represents an integer from 1 to 3, and R 1 and R 2 each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and R 1 and R 2 may be the same or different; wherein M 2 represents a lithium counter ion forming a salt, Y represents an integer from 1 to 4, and R 3 and R 4 each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, and R 3 and R 4 may be the same or different.