No. The minuscule amount of soot produced by a candle is the natural byproduct of incomplete combustion. Candle soot is composed primarily of elemental carbon particles, and is similar to the soot given off by kitchen toasters and cooking oils. These everyday household sources of soot are not considered a health concern, and are chemically different from the soot formed by the burning of diesel fuel, coal, gasoline, etc.
A well-made candle will create virtually no smoke when burning properly. However, if the wick becomes too long, or an air current disturbs the flame's teardrop shape, small amounts of unburned carbon particles (soot) will escape from the flame as a visible wisp of smoke. Any candle will soot if the flame is disturbed.
To avoid this, always trim the wick to ¼ inch before every use and be sure to place candles away from drafts, vents or air currents. If a candle continually flickers or smokes, it is not burning properly and should be extinguished. Allow the candle to cool, trim the wick, make sure the area is draft free, then re-light.
No. All types of quality candle waxes have been shown to burn cleanly, safely and in the same manner.
Yes. When a candle burns, the wax is drawn into the wick, where it is "consumed" by the candle flame to produce water vapor and carbon dioxide. The only difference with a scented candle is that a small amount of fragrance is released as well.
Probably. Studies have shown that beeswax, paraffin and vegetable-based waxes are biodegradable. The vast majority of candles today are made primarily from these waxes.
A natural ingredient, as opposed to a manufactured or synthesized ingredient, is not necessarily any safer. In fact, scores of natural ingredients are known to be extremely toxic to humans in very small amounts.
No. Paraffin wax – like all candle waxes - is non-toxic. In fact, paraffin is approved by the U.S. Food and Drug Administration for use in food, cosmetics, and medical applications. Food-grade paraffin is commonly used for manufacturing candles.
Although millions of Americans regularly use scented candles without any negative effects, it is always possible that a particular fragrance might trigger a negative reaction in sensitive individuals. Individuals with known sensitivities to specific fragrances may want to avoid candles of those scents. In addition, consumers should remember to burn all candles, whether scented or unscented, in a well-ventilated area.