![]() Part three of the test: What temperature and duration does each clay need to not break, using each method? Final results with the least yellowing without cracking (well, almost). I tried different temperatures and durations. In the process, some yellowed or browned. I’d previously learned that more heat or the correct heat for a longer time should solve the breakage problem. Part two of the test: Do they break? Unfortunately, yes. Clays all baked for 30 minutes at manufacturer’s recommended temperatures. Part one of the test: Do they change color in the oven? Yes, some do. ![]() Four methods tested: Baking pans with two small tiles covered with aluminum foil buried in cornstarch and uncovered. If you live at a lower elevation, the temperatures I’ve used may be too high for you. I live at 85oo feet which means I may need to increase temperatures and/or bake times. (Some packages still say just 10 minutes, which can’t be right.) Premo clay- 275˚F for 30 minutes per 1/4″ I tried to follow the manufacturer’s recommended temperatures which are:įimo clay – Don’t heat above 265˚F (no duration given) When the swatches were cool, I tried to break them by bending them until the short ends met. Polyester fiberfill can make little lines on the clay, so I didn’t test that option. in an aluminum “baking box” with two small ceramic tiles. ![]() Then I baked them using these four methods: To find what works, I first made swatches of four different brands of clay: Kato, Premo, Soufflé and Fimo. It’s easy to avoid a color shift if the temperature isn’t too high, but then the clay is more susceptible to breakage. I’d love to learn how to bake polymer clay so it looks like the photo above, without yellowing or cracking.
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