Ceramic Pie Weights are important for a perfect pastry crust. Serve as a temporary filling during the first round of baking, preventing puffing. Its Chemistry - As dough bakes, fat melts at a different rate than rest of the ingredients. This is a good thing, because steam is responsible for the flaky layers you associate with a perfectly prepared pastry crust. When there is no filling to weigh it down, steam will cause the crust to puff up and deflate, leaving a wrinkly mess that is not fit for filling. Properties Ideal for blind baking of dough bases Prevents dough bottoms from collapsing or forming air bubbles Perfect heat conduction and for evenly baked bases Sufficient for baking tins up to 28 cm Material Made of high-quality ceramic Heat-resistant up to 230 °C Cleaning Clean with mild detergent and allow to dry thoroughly