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US 2014/0198167 A1Published application
Photochromic phase change ink compositions
AssigneeXerox Corporation
InventorsGabriel Iftime, Daryl W. Vanbesien, Stephan V. Drappel, Jennifer L. Belelie, Naveen Chopra, Adela Goredema
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Abstract
A phase change ink composition comprising an amorphous component, a crystalline material, a photochromic material and optionally, a colorant, which are suitable for ink jet printing, including printing on coated paper substrates. The novel phase change ink formulation allows the ink to change color when exposed to UV light, reversibly and multiple times, providing an ink suitable for use in security applications.
Claims20
A phase change ink comprising:
- a crystalline component having a viscosity of less than 12 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature;
- an amorphous component having a viscosity of less than 100 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature;
- a photochromic material;
- and
- an optional colorant.
2 more elements
A phase change ink comprising:
- a crystalline component having a viscosity of less than 12 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature;
- an amorphous component having a viscosity of less than 100 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature;
- a photochromic material;
- and
- a colorant selected from the group consisting of a pigment, dye or mixtures thereof.
2 more elements
A method for confirming authenticity of an item, comprising:
- providing a phase change ink for use in an inkjet printing apparatus, comprising:
- a crystalline component having a viscosity of less than 12 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature,
- an amorphous component having a viscosity of less than 100 cps at a temperature of about 140° C. and a viscosity of greater than 1×106 cps at room temperature,
- a photochromic material, and
- an optional colorant;
- using the phase change ink in an inkjet printing apparatus to form text or image on an item;
- exposing the formed text or image on the item to ultraviolet light;
- and
- confirming a color change to the formed text or image upon exposure to the ultraviolet light, wherein the color change confirms authenticity of the item.
6 more elements
Dependencies are inferred from the claim text.