The secrets of a perfect soy candle
Here at Mood Alchemy we strive to bring you the most perfect product possible.
After extensive testing and development by our research chemists, we have discovered the secrets to making a perfect soy candle – and now we have unlocked them for you below……….
Problem: The glass candle container appears to have areas of different colours on the container sides.
Secret : The colour zoning is caused by “shrink back” of the soy wax from the container wall. This occurs when the temperature differential between the container and the wax is too high – and the wax does not adhere to the container sides. It can also occur if the candles cool too quickly after they have been poured. The secret is to have the containers and the soy wax at similar temperatures when pouring.
Problem: The soy wax has cracked around the wick.
Secret: This occurs because the coefficients of thermal expansion are different for different materials. So the soy wax and the wick material will expand and contract at different rates when subjected to a temperature change – resulting in a gap between the two materials. The secret is to insert the wick into the soy wax slowly and at alower temperature – in order to allow the system to reach thermal equilibrium. This will reduce the differential rate of thermal expansion between the soy wax and the wick material.
Problem: A chalky white substance has appeared on the top of my soy candle.
Secret: This is known as “frosting” and is indicative of a change in the crystal structure of the soy wax. This structural change can occur under these conditions:
(i) The soy wax pouring temperature is too high.
(ii) The soy candles were cooled too quickly.
(iii) The soy candles were stored at too cold a temperature.
Problem: The flame is large and smoking.