Patent Number: 6,332,919

Title: Ink, ink set, ink cartridge, recording unit, image recording apparatus and image recording method

Abstract: Provided is a black ink capable of mitigating the dependency on image quality of recording media and giving a high quality image stably, which comprises at least one salt selected from the group consisting of (M1).sub.2 SO.sub.4, CH.sub.3 COO(M1), Ph_COO(M1), (M1)NO.sub.3, (M1)Cl, (M1)Br, (M1)I, (M1).sub.2 SO.sub.3 and (M1).sub.2 CO.sub.3, where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group, and a self dispersible carbon black.

Inventors: Osumi; Koichi (Yokohama, JP), Hattori; Yoshifumi (Yamato, JP), Takizawa; Yoshihisa (Machida, JP), Mishina; Shinya (Kawasaki, JP), Sanada; Mikio (Yokohama, JP), Teraoka; Hisashi (Kawasaki, JP), Yakushigawa; Yuko (Kawasaki, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B41J 2/01 (20060101); C09D 11/00 (20060101); C09D 011/02 ()

Expiration Date: 12/25/2018