Glass and ceramic objects having durable lustrous coatings and methods of producing
OwnerHarry C. McDanielinventor
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Abstract
Glass objects and glazed ceramic objects have a durable thin lustruous coating of a flux-free and frit-free inorganic based luster pigment particles. An application method comprises initially applying the pigment particles to a surface of the glass or ceramic object at a level of from about 0.1 gram to about one gram per square foot and then heating the surface to a temperature and for a time sufficient to fix the luster pigment particles directly to the surface. The resultant lustrous coating is less than about 25 microns in thickness.
Claims26
A method of producing a durable lustrous coating on a vitreous surface of an article comprising:
- (a) applying to the vitreous surface a coating of luster pigment consisting essentially of inorganic platelet-shaped particles having a metal oxide surface coating in an amount to provide a durable lustrous coating on the article of less than about 25 microns in thickness;
- and
- (b) heating the vitreous surface to a sufficient temperature and for a sufficient time to fix the platelet-shaped particles of luster pigment thereto and provide the durable lustrous coating of less than about 25 microns in thickness.
A glass or ceramic article having a durable lustrous coating on a vitreous surface thereof, wherein the lustrous coating comprises inorganic platelet-shaped luster pigment particles from about 1 micron to about 180 microns in length, about 1 micron to about 180 microns in width, and about 0.1 microns to about 3 microns in thickness and further wherein the platelet-shaped particles are mica or glass with a surface coating of at least one metal oxide layer, the durable lustrous coating having a temperature stability of at least about 800 degrees Fahrenheit and a thickness of less than about 25 microns on the surface of the article.
Dependencies are inferred from the claim text.