INK, INK JET RECORDING METHOD, RECORDING UNIT, INK CARTRIDGE, AND INK JET RECORDING APPARATUS

WIPO Patent Application WO/2006/004203

A1

An ink for ink jet recording satisfying the following requirements (A) and (B) possesses excellent color development and moisture resistance. (A) A color difference E of 9 or less as judged by a method comprising the following steps (1) to (3). (1) The step of applying an ink containing a colorant, water, and a water soluble organic solvent, which has a lower evaporative rate X than water, has a moisture absorption Y (mass%) of not less than 20 and satisfies Y ≥ 2.8X + 10, and then superimposing an ink having the same composition as the above ink except for the use of water instead of the colorant. (2) The step of allowing the record to stand under the first and second conditions. (3) The step of judging the record in terms of a color difference (&Dgr E) represented by formula (1): wherein L₁, a₁ and b₁ represent L, a and b of Lab color system before the second standing; and L₂, a₂ and b₂ represent L, a and b of Lab color system after the second standing. (B) A content of the water soluble organic solvent satisfying Y ≤ 2.8X + 10 of not less than 50% by mass.

YOSHIZAWA JUN (JP)
SATO SHINICHI (JP)
NAKAMURA KUNIHIKO (JP)
YAMASHITA TOMOHIRO (JP)

PCT/JP2005/012701

January 12, 2006

July 04, 2005

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CANON KK (JP)
YOSHIZAWA JUN (JP)
SATO SHINICHI (JP)
NAKAMURA KUNIHIKO (JP)
YAMASHITA TOMOHIRO (JP)

B41J2/01; B41M5/00; C09B56/04; C09B56/08; C09B67/44; C09D11/00; C09D11/328

WO2005033211A1

2005-04-14

JP2003321627A	2003-11-14
JP2002285055A	2002-10-03
JP2003026967A	2003-01-29
JP2004083697A	2004-03-18
JP2003321627A	2003-11-14
EP1669413A1	2006-06-14

See also references of EP 1767590A4

Okabe, Masao (2-3 Marunouchi 3-chom, Chiyoda-ku Tokyo, JP)

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