Initially erasable ball pen ink
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United States of America Patent
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-
Apr 19, 1988
Issued Date -
N/A
app pub date -
Apr 21, 1987
filing date -
Dec 14, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A ball pen ink of transiently erasable type to be dispensed from a pressurized ball pen incorporates an elastommeric polymer, pigment and a mixed solvent system. The mixed solvent system includes a volatile solvent component, a non-volatile solvent component and a non-volatile solvent/plasticizer component in such relative amounts and with relation to the elastomer and pigment combination as achieves a balance between ink viscosity and thixotropy to provide good writing qualities.
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