Water based ink for ball-point pen and ball-point pen using the same
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United States of America Patent
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N/A
Issued Date -
Sep 30, 2004
app pub date -
Mar 23, 2004
filing date -
Mar 26, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention is to provide a water based ink for ball-point pen capable of writing also on a non-permeable surface and ball-point pen using a same ink. In the invention, there are provided a solvent formed by a water and an alcoholic solvent having a vapor pressure at 20.degree. C. of 0.5 kPa or higher, a pigment constituting a coloring material, a water-soluble resin constituting a writing fixing agent, and a surfactant of phosphoric acid ester type wherein an ink viscosity at 20.degree. C. is within a range of 5 to 30 mPa.multidot.s, and ball-point pen using the same ink.
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