Patent ID: 7241332
Filing Date: 2007-07-10
Classification: C09D

Abstract:
1. An ink set composed of multiple inks comprising at least: an ink jet cyan ink comprising one of a compound represented by the following general formula (1) and a compound represented by the following general formula (2) as a coloring material; and an ink jet yellow ink comprising at least one kind of coloring material selected from the following A group and at least one kind of coloring material selected from the following B group; A group: C.I. Direct Yellow 132 and C.I. Direct Yellow 173 B group: C.I. Direct Yellow 142, C.I. Direct Yellow 86, and a compound represented by the following general formula (3); wherein M represents an alkali metal or ammonium; R 1 and R 2 each independently represent a hydrogen atom, a sulfonic group, or a carboxyl group, provided that R 1 and R 2 are not simultaneously a hydrogen atom; Y represents a chlorine atom, a hydroxyl group, an amino group, or a monoalkylamino or dialkylamino group; 1 represents 0 to 2, m represents 1 to 3, and n represents 1 to 3, provided that l+m+n=3 to 4; and positions at which substituents are present are 4- or 4′-positions; wherein M represents a hydrogen atom, an alkali metal, ammonium, or an organic ammonium; wherein M's each independently represent a hydrogen atom, an alkali metal, an alkali earth metal, a cation of organic amine or an ammonium ion, and n's each independently represent 1 or 2.