Water-based, resin-free and solvent-free eradicable ball-pen inks
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United States of America Patent
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Jan 16, 2007
Grant Date -
Feb 16, 2006
app pub date -
Jul 15, 2004
filing date -
Jul 15, 2004
priority date (Note) -
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Abstract
Improved combination eradicable ball-pen and re-write inks are disclosed. The combination eradicable and re-write ball-pen inks disclosed include water, glycerol, one or more acids and an eradicable dye. Glycerol is present in an amount greater than the water content, which is relatively low and the eradicable dye is provided in substantial amounts so that the glycerol and eradicable dye provide the requisite viscosity for a ball-pen ink. The combination of the high dye content and acid content also enables the eradicable ball-pen ink to be used as the re-write ink.
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