A method of hollow casting in which a liquid or molten substance is hardened against the walls of a cold mold, generally with the aim of making a cast with very thin walls. The mold is rocked and rolled to insure that all of the smallest spaces are reached, and the walls are more or less even. Excess material is often poured out. Chocolate is regularly cast into bunnies and other shapes in this way. The indirect cast wax model in lost-wax casting is cast in this way in a plaster mold which has first been moistened. Plaster can itself be slush cast. Slip casting is a type of slush casting.Also see release agent.