Enamel Glass paints are not like kiln fired ceramic glazes. They do not fuse to the underlying glass but are a durable non-toxic plastic coating that will adhere very well to glass if you follow the following steps. You can burn the coating like toast if you put them in too hot an oven. Charred teacups anyone?
Air dry for 21 days or bake.
- Air dry 1 hour
- Place in cool oven, heat to 350°F (177°C).
- Bake 30 minutes, cool in oven, remove.
Even though they are certified non-toxic, glass painting enamels are not recommended for use in direct contact with food.
If you must use the dishwasher, use the top rack and a gentle cycle.