Title:
AQUEOUS INK
Document Type and Number:
WIPO Patent Application WO/2011/013308
Kind Code:
A1
Abstract:
The present invention relates to an aqueous ink having a surface tension of 34 mN/m or less including a self-dispersion pigment and water. In the aqueous ink, the self-dispersion pigment has a plurality of pKa values that are 8.0 or less. Assuming that the lowest pKa value among the plurality of pKa values is pKa1 and the highest pKa value among the plurality of pKa values is pKa2, pKa1 and pKa2 satisfy Mathematical formula (1), and the pH value of the aqueous ink satisfies Mathematical formula (2).
Inventors:
YOSHIZAWA ATSUHITO (JP)
OOKUBO TAKETOSHI (JP)
NAKAZAWA IKUO (JP)
KOIKE SHOJI (JP)
OOKUBO TAKETOSHI (JP)
NAKAZAWA IKUO (JP)
KOIKE SHOJI (JP)
Application Number:
PCT/JP2010/004546
Publication Date:
February 03, 2011
Filing Date:
July 13, 2010
Export Citation:
Assignee:
CANON KK (JP)
YOSHIZAWA ATSUHITO (JP)
OOKUBO TAKETOSHI (JP)
NAKAZAWA IKUO (JP)
KOIKE SHOJI (JP)
YOSHIZAWA ATSUHITO (JP)
OOKUBO TAKETOSHI (JP)
NAKAZAWA IKUO (JP)
KOIKE SHOJI (JP)
International Classes:
B41J2/01; B41M5/00; C09B67/20; C09B67/44; C09C1/48; C09C3/08; C09D11/00; C09D11/322; C09D11/38; D06P5/00
Domestic Patent References:
| WO2009014241A1 | 2009-01-29 |
Foreign References:
| JP2009515007A | 2009-04-09 | |||
| JP2008524400A | 2008-07-10 | |||
| JP2009503239A | 2009-01-29 | |||
| JP2005272839A | 2005-10-06 | |||
| JP2001055533A | 2001-02-27 | |||
| JP2002201390A | 2002-07-19 |
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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