Patent ID: 6761759
Filing Date: 2004-07-13
Classification: C09D

Abstract:
An ink composition which contains a coloring agent, water, a water-soluble organic solvent and one or more carbazide type compounds, wherein said organic solvent is a liquid at least in the temperature range of 0 to 40Â° C., and has a solubility of 1 wt % or greater with respect to water at a temperature of 20Â° C., and a saturation vapor pressure of 1.7 Pa or less at a temperature of 20Â° C., and said organic solvent is contained in the ink composition at the rate of at least 10 wt % and no greater than 35 wt %, and wherein said carbazide type compounds are compounds that are expressed by the general formula R1R2NCONHNR3R4, wherein R1 through R4 each independently indicates a hydrogen atom, an alkyl group which may be substituted or an aryl group which may be substituted, or compounds that are expressed by the general formula R5R6NNHCONHNR7R8, wherein R5 through R8 each independently indicates a hydrogen atom, an alkyl group which may be substituted or an aryl group which may be substituted.