Patent Number: 7,232,211

Title: Inkjet recording ink, inkjet recording method, ink cartridge, and inkjet recording system

Abstract: An inkjet recording ink is composed of an encapsulated water-insoluble colorant encapsulated with a high-molecular dispersant, a water-soluble organic solvent, and water. The water-insoluble colorant is at least one colorant selected from the group consisting of C.I. Solvent Yellow 21, 42, 79, 82, 83:1, 88 and 151, at least one colorant selected from the group consisting of C.I. Solvent Red 8, 49, 83:1, 91, 127 and 218, at least one colorant selected from the group consisting of C.I. Solvent Black 3, 27, 29 and 45, or at least one colorant selected from the group consisting of C.I. Solvent Blue 25, 38, 44, 67 and 70. The high-molecular dispersant is a block copolymer comprising at least one hydrophobic block and at least one hydrophilic block, which have been obtained by polymerizing vinyl ethers as monomers, respectively. The inkjet recording ink can stably record images of high fastness and excellent quality over a long period even under severe environmental conditions.

Inventors: Yamamoto; Tomoya (Mitsukaido, JP), Tachibana; Yukiko (Misukaido, JP), Inoue; Hitoshi (Mitsukaido, JP), Yashiro; Ryoji (Mitsukaido, JP), Ookawa; Takayuki (Mitsukaido, JP), Morioka; Junko (Mitsukaido, JP)

Assignee: Canon Finetech Inc.

International Classification: G01D 11/00 (20060101)

Expiration Date: 2019-06-19 0:00:00