Hollow Casting is a method of pouring liquid clay into an empty plaster mold for producing a shell of a particular shape. The method differs according to the medium used. Mostly, cast metal sculptures are designed in a hollow manner to confirm that none of its parts are thicker than the other. A difference which occurs in the thickness would result in the cropping up of tensions in the metal when it shrinks while cooling. Hollow casting is used to make candle sticks and other ornamental objects like lamp bases.