Ink composition for oil-based ballpoint pen and oil-based ballpoint pen using the ink
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United States of America Patent
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May 31, 2005
Grant Date -
Jun 17, 2004
app pub date -
Sep 24, 2003
filing date -
Sep 25, 2002
priority date (Note) -
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Abstract
An ink composition for oil-based ballpoint pens is comprised of a solvent, a colorant and an anti-corrosive wetting agent. The solvent is a water containing water-in-oil-type organic solvent. The colorant is a combination of a dye and a pigment, wherein the pigment is dispersed in the ink with a nonionic surfactant. The anti-corrosive wetting agent is a phosphate based surfactant. An oil-based ballpoint pen using the above ink is also included.
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