Water-based, resin-free and solvent-free eradicable ball-pen inks
AssigneeSanford, L.P.
InventorsDavid Godbout, Wing Vincent Kwan
Life of this patent
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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.
Claims48
An eradicable ball pen ink comprising:
- water,
- a polyol,
- an acid,
- an eradicable dye,
- wherein the ink is free of non-polar organic solvents and has a ratio of polyol to water that is greater than 1.
An eradicable ball pen ink comprising:
- water,
- a polyol,
- an acid,
- an eradicable dye,
- wherein the ink is free of organic solvents and free of resins.
An eradicable ball pen ink comprising:
- water,
- a polyol,
- an acid,
- an eradicable dye in an amount greater than 20 wt %,
- wherein the ink is free of organic solvents, is resin free and has a ratio of glycerol to water is greater than 2:1.
A tinted fluid comprising:
- water,
- a polyol,
- an acid,
- an eradicable dye,
- wherein the fluid is free of non-polar organic solvents and has a ratio of polyol to water of greater than 1.
Dependencies are inferred from the claim text.