Cracks or little holes can form on the top of your newly poured candles, caused by air bubbles trapped in the wax. A common trait of all soy waxes, caused by the melt pool cooling unevenly when the flame is blown out.
One of the next things we wondered was, why do soy candles have uneven surface?
Even the most experienced candle maker will often find their finished soy candles have an uneven, rough surface (like the picture below). This can be caused by air escaping out of the top surface of the wax.
Why do my soy candles frost?
Frosting is a byproduct of a natural wax, and is caused by the growth of tiny crystals on the surfaces of the wax. All soy wax will frost over time, but luckily frosting is solely an aesthetic issue and does not affect the way your candle burns or smells. Mix melted wax less vigorously.
All soy waxes frost and is a sign that you are using 100% natural soy wax. Some soy waxes have additives to help prevent frosting however if you want a 100% natural product then expect some frosting sooner or later. Frosting does not affect the performance of your candle and is something that you shouldn’t stress over.
Moreover, why is my soy wax frosting?
Frosting is a perfectly natural effect of using soy wax and is unique to vegetable waxes, especially soy. It is the natural wax re-crystallizing. All soy waxes frost to some degree and is a sign that you are using 100% natural soy wax. It is more noticeable with coloured candles.
Some sources claimed try making non-colored soy candles, adding color makes the frosting more noticeable. Add 1/2% (or 1/8 tsp. per pound) of UV Inhibitor to help protect the wax from the frosting effects light has on it.
Why do soy wax candle makers crack glass?
Another concern facing soy wax candle makers is the one of a glass container cracking. A glass container may crack is there is not enough wax left to absorb the heat of the flame. Which can make the glass hot and crack over a period of time. To make sure this does not happen you want to make sure to use a soft melt wax like the ones mentioned above.
Why are my candles sinking in the middle?
Hollowing or Sinking. This usually occurs when the pour temperature is too low. If the candles are cooling too quickly the wax on top dries while the underneath is still quite warm. This causes the wax to suck down on itself as it continues to dry.
If the candles are cooling too quickly the wax on top dries while the underneath is still quite warm. This causes the wax to suck down on itself as it continues to dry. To remedy, increase the pour temperature incrementally and make sure the wax is allowed to cool slowly and evenly.
You might be thinking “Why does my Candle have frosting on it?”
Unfortunately, frosting is a normal, expected side effect of soy wax candles. It also occurs in other wax types too, like palm wax. Paraffin wax is a mostly inert substance with a more stable crystalline structure to lessen the effects of polymorphism.