Alumina hydrate is a powder ideal for supporting delicate piecesespecially wet pieces with curved surfaces. Pieces should be cradled by the powder, which will hold them and be unaffected by the heat. A thin layer of alumina hydrate is always helpful, especially when firing rings (which need to slide) or enamels (which might otherwise stick to the shelf). For larger objects, contain the powder in a clay flower pot saucer (see illustration on the left).