These glow a certain color when they get to be a certain temperature. Since different parts of the flame have different temperatures, these bits of wax molecules make those areas of the flame glow ...

It's best to add scents to your melted wax after you take it off the heat and allow it to briefly cool, but before you pour it into the container. If you want to add a little color to your candle ...

If you want your candles to have color, dye is another essential material. Dyes used to tint melted wax come in several forms, including blocks, cakes, chips, flakes, and liquids.