Kitchenware introduce utensils, appliances, dishes, cookware, and so on for use in the kitchen.
A ceramic knife is a knife made out of very hard and tough ceramic, often zirconium dioxide (ZrO2; also known as zirconia).
These knives are usually produced by dry-pressing zirconia powder and firing them through solid-state sintering.
The resultant blade is sharpened by grinding the edges with a diamond-dust-coated grinding wheel.
Zirconia is 8.5 on the Mohs scale of mineral hardness, compared to 4.5 for normal steel and 7.5 to 8 for hardened steel and 10 for diamond.
This very hard edge rarely needs sharpening.
BPA is short for Bisphenol A. BPA is a chemical used in large quantities in the production of polycarbonate plastics and epoxy resins.
Polycarbonate plastic is found in food and drink packaging and in water bottles, and epoxy resins are found in lacquers used to coat metal.