Containers for every type of candle.
Choosing a candle container may seem to be a simple and personal decision based mainly on taste. This is true, but if you consider some additional factors, you can save yourself a lot of time and trouble in making the perfect candle.
When a candle burns, it forms a circular burn pool in the wax. As the candle burns down, the burn pool goes deeper into the candle, so that the shape of the melted wax is a cylinder (like a soda can). Therefore, the easiest container to wick is one shaped like a cylinder (like our apothecary jars). You can certainly use a jar with a taper or bulge in it, but it will be significantly more difficult to wick. The same goes for square jars.
Another tip having to do with wicking... In our extensive testing, we've found that wicking a jar over 3-1/2 inches is very difficult with a single wick, especially a candle made with soy wax and a lot of fragrance (our personal favorites!). We recommend 3 inches or less this for easy wicking and less soot.
Not all containers can be used safely as candle containers. Many jars are not made to handle the heat created by a burning candle. The ASTM is a world-wide standards organization outlines how a container must be made to be safe for candles. There are lots of very technical details at the ASTM website, but all you only need to make sure that your supplier can certify that their containers meet this standard. All of the candle containers at Candlescience definitely do.
How do I choose the best container for my candle?
Based on our experience, and lots of feedback from our customers, we'd like to offer some recommendations for choosing the right candle container for the job:
The easiest containers for making soy candles are those with opaque (not clear) sides. If/when a soy candle frosts, it is very visible through the sides of a translucent (clear) container, like glassware. This can be okay, especially if the wax has no color in it, but expect to see the frosting on the sides when you use glass containers.