Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Reexamination Certificate
2011-02-15
2011-02-15
Wu, David (Department: 1762)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
C524S090000, C106S031780, C523S160000
Reexamination Certificate
active
07886581
ABSTRACT:
The invention provides an oil-based ink composition for ink jet recording, which is best suited for printing onto polyvinyl chloride substrates, and improved in terms of both the stabilities of ink on storage and jetting, and a method for inspecting the same. The oil-based ink composition for ink jet recording comprises as a main solvent at least a specific polyalkylene glycol dialkyl ether and containing at least a specific quinacridone pigment component. That composition should be such that when a measuring sample comprising it is analyzed by means of high speed liquid chromatography under specific measuring conditions, the concentration of a component having a peak at the holding time of 10.3 minutes is 0.4 ppm or less.
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Hara Kazuhiko
Kozuchi Takashi
Sugita Yukio
Tamura Mitsuyoshi
Yamada Mitsuteru
DLA Piper (LLP) US
Nguyen Vu A
Seiko Epson Corporation
The Inctec Inc.
Wu David
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