Fast drying duplicating ink
AssigneeA.B. Dick Company
InventorYoshikazu Mizobuchi
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Abstract
An water-in-oil emulsion duplicating ink comprising a water phase comprising an aqueous dispersion of oxidized carbon black and an oil phase comprising a saturated oil and an unsaturated oil. The ink compositions of the present invention dry quickly, and exhibit minimal dispersion in the paper upon which the ink is applied. The ink compositions of the present invention remain liquid for extended periods of time upon exposure to the atmosphere.
Claims22
A water-in-oil emulsion duplicating ink comprising a water phase comprising an aqueous dispersion of oxidized carbon black and an oil phase comprising a saturated oil and an unsaturated oil.
A method of preparing a water-in-oil emulsifying ink comprising preparing a water phase by mixing an aqueous carbon black dispersion with an aqueous hydrogen peroxide solution in an amount sufficient to effect substantial oxidation of the carbon black surfaces, allowing the hydrogen peroxide to oxidize the carbon black for at least one day, and combining the water phase with an oil phase comprising a saturated oil and an unsaturated oil.
A method of preparing a water-in-oil emulsifying ink comprising preparing a water phase by mixing an aqueous carbon black dispersion with deionized water, contacting the water phase with ozone in an amount sufficient to effect substantial oxidation of the carbon black surfaces, for a period of from about one hour to about forty hours, and combining the water phase with an oil phase comprising a saturated oil and an unsaturated oil.
Dependencies are inferred from the claim text.