Why is my candle leaving black residue?

When candle materials burn inefficiently, it is because combustion is incomplete. The resulting black soot is hydrocarbon-based. Candle soot production normally begins when the particulate matter produced reaches . Over time, these soot particles unite with each other and with dust particles in the air.

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Why did my candle turn brown?

The most common reason for discolouration of candle colour is due to the ultraviolet effects of light, BUT sometimes that a missed assessment and the cause is oxidation of the candle. If you have an un-coloured candle, once exposed to UV lighting, the candle will change to a yellow shade. In respect to this, can you smoke candles? Apparently, the smoke from a burning candle could be as toxic as those from cigarettes or even diesel exhaust fumes. When you think about the dangers of a burning candle, it's probably the risk of a fire that comes to mind, not whether or not you should be inhaling candle smoke.

Subsequently, what colour is the hottest flame?

white-blue When all flame colors combine, the color is white-blue which is the hottest. Most fires are the result of a chemical reaction between a fuel and oxygen called combustion. Then, why do flames go upwards? When a candle burns, the flame heats the nearby air and starts to rise. Basically the continuous movement of hot air going up displaces cooler air down to the side which then gets heated up again and move upwards causing the distinctive shape of the flame and which is why it points only upwards.

Keeping this in consideration, do you cure candles with lids on or off?

Let your candles cure before test burning them. The minimum cure time is 3 days, while 1-2 weeks is the preferred curing time, especially for natural waxes such as soy and coconut. Place a lid on each candle and store them in a place away from excessive heat or light. Keep the container size and room size in mind.