Patent ID: 6048390
Filing Date: 2000-04-11
Classification: C09D

Abstract:
An ink jet recording ink comprising water, a water-soluble organic solvent, and at least one dye having at least one carboxyl group in the form of a free acid, wherein at least one secondary or tertiary amine compound represented by the following general formula (I) and at least one alkali metal hydroxide is contained and the pH value thereof is from 9.1 to 12: ##STR18## wherein, one or two of R.sup.1, R.sup.2, and R.sup.3 are an alkyl group having 1 to 5 carbon atoms in the alkyl chain and substituted by a substituent selected from the group consisting of a carboxyl group, a sulfonic group, an alkali metal salt of a carboxyl group, and an alkali metal salt of a sulfonic group; and the remainder is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, and a substituted alkyl group having 1 to 5 carbon atoms in the alkyl chain and substituted by a hydroxyl group or carbamoyl group.