What does it mean when candles burn black smoke?

The interior of the glass has never been cleaned.. In this case, the accumulated soot from previous burnings falls into the wax and heats up. This blend of soot and wax creates black smoke.

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Should candles burn black?

Candles should not produce black smoke, also known as soot. The type of candle you buy, how it is maintained, and how it was crafted all play a part in producing soot. Paraffin wax produces more black smoke than vegetable waxes. If you don't trim the wick, soot is likely to form. Also, how do i stop my candle from smoking black?

What does the black smoke mean?

Thick, black smoke indicates heavy fuels that are not being fully consumed. At times, black smoke can be an indicator that a manmade material is burning such as tires, vehicles or a structure. Grey smoke can indicate that the fire is slowing down and running out of materials to burn. Keeping this in consideration, are candle wicks supposed to turn black? The most crucial step in getting your candle off to a good start? "Trim that wick!" Huber insists. "As the wick burns it becomes black and sooty by nature," Huber explains. "That soot will rise up when you re-light the wick." So to avoid finding yourself in a cloud of black smoke, trim the wick every time you light.

And another question, what candles dont leave soot?

Soy candles produce less soot and toxic chemicals than candles made from paraffin. Even though the smoke is cleaner, it's a good idea to minimize your intake of any type of smoke.