Erasable ink for ball point pens
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United States of America Patent
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-
Dec 6, 1983
Issued Date -
N/A
app pub date -
Jul 29, 1982
filing date -
Nov 12, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An erasable ink for use in a ball point pen, particularly in a pressurized cartridge, is a fluid comprising at least 10% w of polyvinyl acetate or a copolymer of ethylene and vinyl acetate, and at least 10% w trichloroethylene. The ink preferably also contains at least 5% w of a solvent boiling in the range of 180.degree.-250.degree. C., a plasticizer boiling above 270.degree. C., a colorant, and a tackifier.
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