Why is test burning important?

The Burn Rate is the amount of wax consumed in grams per hour by the candlewick. The higher the burn rate number the more wax will be consumed.
  1. Trim the candlewick to 2.5cm. If testing multiple candles, make sure each one is clearly labeled.
  2. Place candles on a clean, flat, heat resistant surface 100mm apart. This area should be clearly visible from your workspace, as the candles must not be left unattended while lit.
  3. Take note of the diameter of the container. NOTE: on average a candle will burn 2.5cm per hour. 
  4. Based on this diameter, establish a time limit (for example a 5.0cm container should obtain a full melt pool in 2 hours, a 7.5cm container in 3 hours etc.)
  5. Light the candle(s) and record the time. It is critical to keep an eye on the candles while they are burning especially when testing new wicks.
After the required period of time, record the details of the melt pool and appearance of the candle wick; then gently blow out the flame. At this point, the melt pool of a well-wicked candle with has achieved a full melt pool and be approximately 50mm deep. If the wick is mushrooming, the candle sooting, or the melt pool substantially deeper than 50mm, the candlewick is likely too large.
Allow the candle to cool for at least 4-5 hours and repeat steps 1, 5, and 6 until the candle is completely burned. The quality of burn will almost always change during the entire burning of the candle. 
This way, you see exactly what your customers will see!
Any adjustments to the wick can then be made, and the candle re-tested before the candle is given or sold.
Remember, always place a fire-warning label on the bottom of the candle, to ensure you meet your vicarious liability.
Desired Diameter: Most candle makers want a container candle to burn all the way out to the edge and not leave any wax on the side walls. If you are doing this will a pillar candle, you might choose to leave a 25mm inch of the side wall to avoid the possibility of spillage.