Zen and the Art of Prop Making

Plaster moulds are the easiest and cheapest of all moulds to make. They are also the heaviest and most fragile. There are two ways of making them. The first is to make a waterproof box around your object, pour in the plaster mix and wait for it to set. The second uses plaster bandage which is normally used to set broken limbs. Steps in making boxed plaster moulds Following is a step by step process in making boxed plaster moulds . They are very straight forward and require no special equipment or chemicals. All that is needed to make plaster moulds is plaster of Paris and some scrap timber to make the box section to hold the plaster mix until it sets. Step 1 Fasten your object to the middle of a smooth, flat piece of wood. Make a waterproof timber dam around it a couple of inches higher than the object. Use plasticene to fill all the undercuts on the object and any gaps between it and the base board. Take extra care doing this because it makes for a better mould. This is very ...