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Melt the metal over the hob (Fig.1). Make sure metal is dry
beforehand otherwise metal may spit and water escapes during
melting.
An electric hob is preferable for better control of the heat.
Clamp moulds together (Fig.2) and make sure rough sides of boards
are facing into the mould.
Do not over-clamp the mould as two should be sufficient.
Over-clamping can prevent the escaping of air through the mould.
The quicker the air can escape the better the fill. This can often
be overlooked and lead to gaps in the casting.
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