Ceramic includes earthenware bone china stoneware and porcelain.
Ceramic cups in oven.
Do not preheat the oven because the mug may crack or shatter if it does not gradually heat.
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If the glaze on the ceramic bowl isn t waterproof then the porous clay beneath is unprotected.
Expect to see text that says dishwasher microwave and oven safe on any mug that you can put in the oven.
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When the 30 minutes is up turn off the oven but leave the mug inside.
Most mugs and dishes have a maker s mark that identifies the manufacturer.
Bake for 30 minutes.
If the cup doesn t have any text printed on it check the box that it came in.
Place the freshly painted mug in a cold oven.
Allow the oven and mug to cool together completely.
Step 4 bake your mug for about 35 minutes or for the time indicated in the instructions on the paint packaging.
Many coffee mug sets come with a small book of care instructions.