Soy candles are candles made from soy wax, which is a processed form of soybean oil.  One of the most famous benefits of soy candles is how clean they burn. Soy wax doesn't not produce the black soot like paraffin does. While some might say "no soot", it's actually "little soot". Everything that burns puts off smoke, and soy candles are no exception. However, the amount of smoke released from soy wax is so minimum, there are very few that notice it.

If you have ever had a soy wax candle in the past that did leave black soot around the jar, there are several reasons this may have happened. One explanation is it wasn't 100% soy, but rather a soy/paraffin blend. Many advertise "soy candle" have unknown blends that you may not catch unless you search deep into their site. If it doesn't say 100% or tell you what's in the candles, watch out.

Another reason you see black soot could have been the use of metal wicks. While no candle made in the US has lead, they can have zinc. Zinc wicks are not toxic like lead, but they will produce more soot than cotton or hemp wicks.

When it's said that a candle scent "throws well", this means it fills the room with a strong, lasting scent. Soy wax candles not only have a great scent throw, but also have a cleaner smell. It's been noted by many that paraffin wax will give them headaches. Of course it's not the scent itself, but the additional chemicals the paraffin is putting off. Because soy burns so evenly, you'll get a cleaner scent as well.