A method of casting in which the mould is made of sand and a binder rather than clay, metal or stone. Simple shapes may be cast directly into impressions made in the sand using a pattern. But for more complex objects, sand castings are two part mouldings, with pattern first being impressed into the lower part of the mould. A parting agent is applied to both the surface of the sand and the pattern. Then a box to contain the upper part of the mould is put down around the pattern, and sand is rammed into the box around the pattern to fill the box. The upper part of the resulting mould is lifted off the lower, and the pattern removed. The upper part of the mould is then lowered back on to the lower ready to received the molten metal.