Water-based ink composition and ball pen employing the same
AssigneeMitsubishi Pencil Company, Limited
InventorYoshito Tsumuraya
Life of this patent
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Abstract
Provided are a water-based ink composition characterized by containing 0.01 to 1.0% by weight of high molecular saccharides (trade name: Daiyutan gum) represented by Formula 1 as an essential component in the ink composition and a ballpoint pen in which an ink reservoir in a main body is charged with the above water-based ink composition.
Claims2
A water-based ink composition characterized by containing 0.01 to 1.0% by weight of high molecular saccharides represented by Formula 1 (wherein M represents alkali metal or alkaline earth metal selected from the group consisting of sodium, potassium and ½ calcium, and n is 102 to 1010, and having a molecular weight of 105 to 1013) as an essential component in the ink composition:
Dependencies are inferred from the claim text.