| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sharp image with a sufficient density by containing specific magenta, yellow and cyan inks. SOLUTION: A magenta ink contains one or more kinds of pigments with the free acid type represented by formula I. An yellow ink contains one or more kinds of pigments selected from the group consisting of the compounds with the free acid type represented by formula II. A cyan ink contains one ore more kinds of pigments selected from the group consisting of C. I. Direct Blue 86, C. I. Direct Blue 199, C. I. Acid Blue 9, and the compounds with the free acid type represented by formula III. In the formula I, R<1> , R<2> , R<3> , R<6> , R<7> and R<8> are independently substituted 1-9C alkyl group, or the like, m and n are each 0, 1 or 2, X<1> and X<2> are independently a chlorine atom, or the like, and R<9> is a hydrogen atom, or the like. In the formula II, Ar and Ar<1> are independently an aryl group, or the like. In the formula II, Pc is a phthalocyanine nucleus containing a metal, and R<1> , R<2> and R<3> are independently a hydrogen atom, or the like. |
