Frosting is the result of two different factors. The first is simple. Glass container candles can experience what looks like frosting but is really the candle pulling away from the container and leaving wax residue on the glass. This is an issue of glass adhesion not frosting. The second condition is frosting, also known as "bloom" in the world of fats. You may be familiar with this condition in chocolate. Bloom is the white that appears on chocolate, even fine chocolates will experience this.

When a liquid turns into a solid it forms crystals. Frosting is the formation of a different type of crystal than that of the body of the candle. The frosting and the body are the exact same material with a different crystal structure. For example, when water freezes you may see clear ice with white looking frosting on it. While they appear different, both are made of water.

There are many factors that effect the formation of frosting such as fragrance, dye pour temperature, cooling temperature and storage temperature. Click on Isolating CB Problems or Isolating PB Problems to determine what aspect is causing your frosting. Try altering the pour temperature either up or down by 10 to 30 degrees and make sure the room temperature is about 70°F while the candle cools. When possible store your candles at 70°F. Cold storage temperatures will cause the candle to frost but when warmed to 70°F for a day or two the frosting should disappear.