If you don’t have the original packaging for your clay, look up the manufacturer’s website to find the right temperature. Unfortunately, polymer clay and plasticine clay look and feel almost identical. If you aren’t sure which one you have, don’t try to bake your clay in the oven. Plasticine clay will melt and could start a fire. [2] X Research source
If you are baking more than 1 sculpture at a time, give each one their own piece of parchment paper to keep them separated. Try not to use aluminum foil to bake your clay with, as the foil can heat up in the oven and scorch your sculptures. [4] X Research source
Centering your sculptures will ensure that each one gets an even amount of heat.
If you have to choose between the top and bottom rack, go for the bottom one. This will keep your clay away from the heating element so it’s less likely to get burned.
The bake time may also depend on the thickness of your clay. Generally, the baking time is for a sculpture that’s 1⁄4 inch (0. 64 cm) thick, so you may need to add on more time if yours is thicker. For example, if your sculpture is 1⁄2 inch (1. 3 cm) thick and your bake time is 15 minutes, you’d multiply 15 by 2 to get 30 minutes.
You can also turn off your oven and leave your sculptures in there to cool down instead.
Once you bake polymer clay, you won’t be able to rehydrate it again.
