My pottery is currently made of high fire (2300º F) grolleg porcelain. It is food safe, non-toxic and quite durable. Unless it has Gold Luster* on it, it may be placed in the dishwasher, microwave or oven. Since it has been fired to such a high temperature, even 500º in your oven will not affect it.
However, please do not take it from one extreme temperature to another (like from the fridge directly into hot water.) Properly cared for, your pottery should last at least as long as low-fire pottery has from Ancient Egypt or Greece….say, 3,000 to 5000 years!
Do not use metal scrubbers on the surface as eventually it will scar the glass-like surface. Do not drop or toss onto hard surfaces like the floor. Do not leave it behind at your family’s potluck picnic.
If you do break it, you can glue it back together and use it some more or make into a beautiful mosaic.
My sgraffito ware is made of grolleg porcelain painted over with a pigmented porcelain slip. I draw freehand on the surface and then carve away whatever is not part of my image with small wire loop tools.
I draw inspiration from varied sources. Nature and its ability to rejuvenate the spirit is an endless source of inspiration to me. Many ancient pottery industries inspire me; ancient Egypt and Greece, Pre-Columbian Panama and Equador, The Anasazi and Mimbres potters.
I have been influenced first by my first teacher in 1969, Norboro Kubu and then in 1976, Bob Broderson and then certainly in college by my teachers, Warren Mackenzie and Curtis Hoard. Later at Lill Street in Chicago I worked with, met and admired many more American potters and their work. This has continued in Minnesota with colleagues at the Northern Clay Center and my clay community here in Northfield, the Cannon River Clay Cooperative of which I am a member.
*Do not put pots with metallic luster on them in the microwave! Futher, here is what the Duncan site says about pots with luster on them:
“Dinnerware Safety – Duncan Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away.”