Pour the heated wax in the mould. The temperature of the wax should not exceed 75° (Celcius), or else it may shrink when cooled down...
Cut a piece of cord to hang the relief in. Bend the cord and let the ends sink halfway down in the upper part of the relief. 2/3 in the wax and 1/3 for hanging.
When the mould is cold, the relief can be removed easily.