Food grade ink jet inks for printing on edible substrates
OwnerRobert A. Baydo, Michael Bogomolny +1inventors
InventorsRobert A. Baydo, Michael Bogomolny, Constance L. Lee
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Abstract
Food grade ink jet inks which include food grade pigments, food grade lower alcohols, 1,2-propanediol, and shellacs are provided. Also provided are methods for making the ink jet inks and edible substrates having the food grade ink jet inks applied to a surface thereof. In some embodiments, the food grade ink jet inks contain at least about 20 wt. % propanediol.
Claims57
A food grade ink comprising a food grade pigment;
- a food grade lower alcohol;
- at least about 20 wt. % 1,2-propanediol;
- and a shellac;
- wherein the food grade ink has a viscosity of no more than about 100 cps at 25° C.
A food grade ink jet ink comprising a food grade pigment;
- a food grade lower alcohol;
- 1,2-propanediol;
- and shellac;
- wherein the ink jet ink has a viscosity of about 5 to 75 cps at 25° C., a surface tension of about 25 to 50 dynes/cm at 25° C. and a chloride content of no more than about 100 ppm and wherein the weight ratio of 1,2-propanediol to shellac is at least about 1.5.
A food grade ink jet ink comprising a lake of a food grade, water-soluble colorant;
- a food grade alcohol comprising butanol;
- 1,2-propanediol;
- and shellac;
- wherein the ink jet ink has a viscosity of about 5 to 75 cps at 25° C., a surface tension of about 25 to 50 dynes/cm at 25° C., and an apparent pH of no more than about 5.
A food grade ink jet ink comprising about 1 to 10 wt. % of a lake of a food grade water soluble colorant, about 30 to 45 wt. % 1,2-propanediol, about 5 to 25 wt. % butanol, about 15 to 50 wt. % ethanol and at least about 5 wt. % shellac wherein the ink jet ink has a viscosity of about 5 to 75 cps at 250C., a surface tension of about 25 to 50 dynes/cm at 25° C., and an apparent pH of no more than about 5.5.
A method of preparing a food grade ink jet ink comprising:
- (a) subjecting an admixture comprising food grade pigment, a first food grade lower alcohol, 1,2-propanediol and shellac to shear to form a pigment dispersion;
- and
- (b) mixing the pigment dispersion with a second food grade lower alcohol, additional 1,2-propanediol and additional shellac to form an inkjet ink.
A food grade ink jet ink comprising a food grade lake;
- a food grade lower alcohol;
- 1,2-propanediol;
- and shellac;
- wherein the ink has a chloride ion content of no more than about 50 ppm and a viscosity of no more than about 100 cps at 25° C. and wherein the weight ratio of 1,2-propanediol to shellac is at least about 1.5.
A food grade ink jet ink comprising a food grade lake;
- a food grade lower alcohol;
- at least about 30 wt. % 1,2-propanediol;
- and shellac;
- wherein the ink has a chloride ion content of no more than about 50 ppm and a viscosity of no more than about 100 cps at 25° C.
Dependencies are inferred from the claim text.