When using aluminum molds, there are a few tips and techniques that will help you regardless of the method you use.
1. Take good care of your molds. Do not use them for any other use such as a penholder or thermometer holder because you may scratch the inside, which will be apparent on the finished candle.
2. By heating or cooling the mold, you can achieve different aesthetic qualities to the finished mold. Cold molds give a primitive appearance, while warm molds may give a good gloss.
3. Keep molds level unless a desired layered appearance is trying to be obtained. By resting the mold on various angles, some neat stripes can be achieved.
4. Take careful note on the pour temperatures. By adjusting the temperature, you can control the shrinkage. Pouring too hot produces more shrinkage and may involve more “topping off”, while pouring too cool may not give you enough shrinkage therefore making it difficult to de-mold.