Oil-based pigment ink composition and oil-based pigment ink writing tool
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United States of America Patent
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Jun 20, 2017
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Mar 17, 2016
app pub date -
Apr 14, 2014
filing date -
Apr 25, 2013
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Abstract
An oil-based pigment ink composition contains titanium dioxide pigment, mica pigment, dispersant, oil-soluble resin, and organic solvent, whose viscosity at a shear velocity of 76 (l/s) is 50 mPa-s or lower. The ink composition produces writing with sufficient covering property and legibility, does not form hard cakes, and can release ink in a stable manner from the tip of a writing tool.
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