aevai wonder if #plaster is oven safe, and how well it works with #polymerclay? might be useful for creating support surfaces for irregular polymer clay shapes, or an alternative to foil for interior structures
Wee Mad Hamish@aeva It won't catch fire, if that's what you're worried about. Plaster of paris is derived from gypsum, it's a calcium compound of some manner. But it is partially made of water, and might weaken or crumble if you get it hot enough to drive the water off.
Potential for a small steam explosion if you wrap it completely in polymer clay, but otherwise shouldn't do much at clay baking temps.