Place the mold in a convenient position to receive the hot wax. When the wax is ready, slowly and carefully pour it down the side of the mold to prevent bubbles from forming. Fill the mold to the top. The remaining wax is kept at ready temperature and used to refill the hollow that forms as the wax shrinks, a natural result of the cooling process. When cool, the candle is removed from the mold, the wick trimmed and any final touches made.
Molds can be solid plaster, metal shells or flexible plastic.
The flexible plastic and metal molds are the most popular. If you use wet sand for a mold, it leaves an interesting texture when finished. Allow your mold to cure and then simply peel it off and start making casts. There are unlimited variations that can result in strikingly different and very impressive candles. One is dipping a partially formed candle into vats of different colored wax, then peeling back layers with a knife to reveal the contrasting colors and textures.