Ink, ink cartridge and ink jet recording method
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United States of America Patent
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Mar 31, 2015
Grant Date -
Mar 6, 2014
app pub date -
Aug 12, 2013
filing date -
Sep 5, 2012
priority date (Note) -
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Abstract
An ink containing a first coloring material and a second coloring material, the sum total of these contents being 6.0% by mass or less. The first coloring material is a black coloring material exhibiting a difference Δλmax1 of 20.0 or more between a maximum absorption wavelength in a 20.0% by mass aqueous solution of 1,2-hexanediol and a maximum absorption wavelength in water, the second coloring material is a specific coloring material exhibiting a difference Δλmax2 of 12.0 or less between a maximum absorption wavelength in a 20.0% by mass aqueous solution of 1,2-hexanediol and a maximum absorption wavelength in water, and the sum of the Δλmax1 and the Δλmax2 is 35.0 or less.
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