AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS
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United States of America Patent
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Sep 15, 2016
app pub date -
Sep 19, 2014
filing date -
Sep 30, 2013
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Abstract
Provided is an aqueous ink composition for a writing instrument which is excellent in storage stability of particles such as pigments, a writing property with the passage of time, and quality of the drawn lines, though having a low viscosity, as compared with conventional thickener and gelling agents such as a xanthane gum. The above ink composition for a writing instrument is characterized by containing 0.05 to 1.5% by mass of an oxidized cellulose and having a limiting viscosity of 10 mPa·s or less derived from a Casson's equation.
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