polymer-clay

Polymer Clay Baking Time by Thickness and Brand (2026)

Polymer Clay Baking Time by Thickness and Brand Polymer clay baking time is about 15 minutes per ¼ inch of thickness, scaled by brand at the temperature printed on the package: Original Sculpey bakes 15 minutes per ¼ inch at 275°F, Premo and Fimo bake 30 minutes per ¼ inch (Premo at 275°F, Fimo at 230°F), and Kato Polyclay bakes 10 minutes per ¼ inch at 300°F. A ½-inch piece is two quarter-inch units, so a ½-inch Premo pendant needs 60 minutes minimum. Run your exact brand and thickness through the Polymer Clay Calculator(/crafts/polymer-clay-calculator) to get the temperature and time in one step. Consider a common failure case: a batch of 12 earring blanks baked with the dial set to 275°F, pulled after 20 minutes, that snapped like crackers. A $5 oven thermometer later showed the oven actually held 245°F. A ½-inch Premo piece needs 60 minutes minimum at a...