As it cools it solidifies, So you can make a mould around a
piece of metal, melt it into the mould and when it cools it would
change back into a solid to the shape of the mould.
As it cools it solidifies, So you can make a mould around a
piece of metal, melt it into the mould and when it cools it would
change back into a solid to the shape of the mould.