Ceramic utensils
AssigneeAlfred University Research Foundation, Inc.
InventorsWilliam B. Crandall, Linda J. Wasserstein
Life of this patent
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Abstract
Non-porous, Alfred shale terra sigillata coated ceramic utensils, such as cooking pans, pots, plates, cups and heating and serving dishes, having non-sticking food-contacting surfaces are provided for use in the preparation and/or serving of foodstuffs. The ceramic utensils comprise a ceramic body and an Alfred shale terra sigillata coating on said body, both body and coating preferably being made from Alfred shale.
Claims6
A ceramic utensil having a non-sticking food-contacting surface for use in the preparation and/or serving of foodstuffs, comprising a shaped, fired body having a non-porous, fired Alfred shale terra sigillata coating on at least the food-contacting surfaces thereof, said body having been prepared by firing a green clay composition comprising a shale having approximately the following chemical analysis:
- ______________________________________ Ingredient Ave. % by Weight ______________________________________ SiO.sub.2 61.2 Al.sub.2 O.sub.3 19.6 Fe.sub.2 O.sub.3 7.4 MgO 1.3 CaO 0.4 TiO.sub.2 1.0 Na.sub.2 O 1.4 K.sub.2 O 3.7 Loss on ignition 4.0 100.0 ______________________________________
- and said Alfred shale terra sigillata coating having been prepared by firing on said body a coating composition which has approximately the following formulation:
- ______________________________________ Ingredient % by Weight ______________________________________ Alfred shale (ground) 20 to 40 Dispersing agent 0.01 to 1.0 Water 60 to 80 ______________________________________
In a method for cooking a foodstuff, the improvement wherein said foodstuff is cooked in a non-sticking cooking utensil comprising a fired body of Alfred shale having at least the food-contacting surface of said utensil coated with a non-porous dried layer of Alfred shale terra sigillata, said Alfred shale terra sigillata coating of said utensil having been prepared by firing on said body a coating composition having approximately the following formulation:
- ______________________________________ Ingredient % by Weight ______________________________________ Alfred shale (ground) 20 to 40 Dispersing agent 0.01 to 1.0 Water 60 to 80 ______________________________________
Dependencies are inferred from the claim text.