Wet spots can often be found along the sides of the candles that fill candle jars. Two main causes of these wet spots include the shrinkage of the drying candle wax and the formation of bubbles in the hot wax. These spots are often considered a defect by both the manufacturers and consumers of the candle jars. For this reason, candle makers strive to find methods that prevent the wet spots from forming in the candle jars. If you enjoy making candle jars at home, some methods can help prevent wet spots from emerging in your candles.
Heat the jars you will use for your candles to about 43.3 degrees Celsius before adding the hot candle wax. You can heat your jars by placing them in a warmed oven or by warming them with a heat gun. This helps prevent the wax from shrinking and forming spots in the sides of the jars, which often occurs due to the temperature differences between cool jars and warm wax.
Tap the sides of the candle jars after you have poured in your wax. This helps release trapped air bubbles, sending them to the top of the wax.
Blow a heat gun at the top of the candle jar after tapping it. This helps pop the bubbles that were released after the jar was tapped in step two.
Blow your heat gun at the sides of the candle jar to help prevent any bubbles from becoming trapped there.
Move the candle jars to a warm area after they begin to set. The warm area helps the candles to cool slowly, which is essential for preventing the wax from shrinking away from the sides of the jar. A warmed oven works nicely for this.
Remove the candles from their warmed location when they have completely set up. Do not attempt to move them until the wax has completely hardened.
Store your candle jars in a cool location. This is essential for preventing the wax from melting to the glass, possibly causing spots in the jars.