ORGANIC PIGMENT POWDER, WATER-BASED INK, INK CARTRIDGE, RECORDING UNIT AND INK JET RECORDER

Title:

ORGANIC PIGMENT POWDER, WATER-BASED INK, INK CARTRIDGE, RECORDING UNIT AND INK JET RECORDER

Document Type and Number:

Japanese Patent JP2002220545

Kind Code:

A

Abstract:

To obtain an organic pigment powder capable of being micronized to ultrafine particles by a gas phase method and maintaining excellent hue after being brought to be the ultrafine particles by the gas phase method.

This organic pigment powder comprises anthraquinone as a main constituent and its primary particles have 10-50 nm number average particle size.

Inventors:

TOCHIHARA SHINICHI
SHIROTA KINU
KO MASAAKI
KOIKE SHOJI

Application Number:

JP2001018434A

Publication Date:

August 09, 2002

Filing Date:

January 26, 2001

Export Citation:

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Assignee:

CANON KK

International Classes:

B41J2/01; B41M5/00; B82Y30/00; C09B1/467; C09B5/16; C09B67/00; C09B67/02; C09B67/20; C09D11/00; C09D11/322; (IPC1-7): C09B67/02; B41J2/01; B41M5/00; C09B1/467; C09B5/16; C09B67/20; C09D11/00

Domestic Patent References:

JPH039363A	1991-01-17
JPH04104801A	1992-04-07
JPH11333288A	1999-12-07
JPH1157458A	1999-03-02
JPH11181340A	1999-07-06
JPH11158401A	1999-06-15

Attorney, Agent or Firm:

Keizo Nishiyama (1 person outside)

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