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Soy vs. Paraffin Candles - The Great Debate

Author: Stephanie Davies Author Ranking Bronze | Posted: 06-07-2006 | Comments: 4 | Views: 9,312 | Rating:  (1,621) Article Popularity - Gold (?) Got a Question? Ask.
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You may have heard stories recently about the benefits of soy wax, or about how paraffin wax is unhealthy or not good for you. In this article we will examine the myths and rumors and give the straight facts on both soy and paraffin wax candles and allow you to see what the truth and fuss is all about.

Before we start, it is important for you to know what the actual difference is between soy and paraffin waxes, and to see how each are produced. Let's start with paraffin wax, the most common wax to create candles with today. If you purchase a candle that isn't marked as soy, beeswax, or any other special blend of wax, chances are that you have purchased a candle that is made from a paraffin blend of wax.

Paraffin wax is a heavy hydrocarbon that comes from crude oil. Paraffin waxes are produced by refining or separating the waxes out of crude mineral oils. Obtained from the ground, crude oil is a compositionally varied product, consisting of a mixture of hydrocarbons. Another name for crude oil is fossil fuel. Crude oil is transported to refineries where it is refined into finished products by complex processes. One of the many products derived from refining is lubricating oil. It is from the lube oil refining process that petroleum waxes are derived. There are three general categories of petroleum wax that are obtained from lube oil refining. They include paraffin, microcrystalline and petrolatum. Paraffin waxes are derived from the light lubricating oil distillates. Paraffin waxes contain predominantly straight-chain hydrocarbons with an average chain length of 20 to 30 carbon atoms.

Soy wax, on the other hand is made from vegetable matter. Soy wax is a vegetable wax made from the oil of soybeans. After harvesting, the beans are cleaned, cracked, de-hulled, and rolled into flakes. The oil is then extracted from the flakes and hydrogenated. The hydrogenation process converts some of the fatty acids in the oil from unsaturated to saturated. This process dramatically alters the melting point of the oil, making it a solid at room temperature. The leftover bean husks are commonly used as animal feed. The U.S. grows the vast majority of the world's soybeans, primarily in Illinois, Iowa, and Indiana.

So now that you know how both soy and paraffin candles are made, let's take a look at some of the advantages and disadvantages of both types.

There are a lot of myths surrounding soy candles. Most of these are designed to sell soy candles better, and have very little truth in them. A great example is the great "no soot" myth. Sites that sell soy candles love to say that there is absolutely no soot produced with a soy candle. However, there is no truth and all hype to that claim. Absolutely, positively, and most importantly, scientifically, all organic compounds when burned will emit some carbon (soot) due to incomplete combustion. Sooting is primarily a factor of wick length and disturbance of the flame's steady teardrop shape. There is no such thing as a soot-free candle. Further, while soy wax is all-natural and will not produce the thick black soot that you see on some paraffin containers, it does produce soot. An important fact to remember is that not all soot is black. Soot can be a "white soot" that cannot be seen with the naked eye. Soy wax will produce little black soot - unless the candle is improperly wicked, made, or burnt, but it may produce white soot.

But before you get scared of soot, let me tell you, that soot is in fact not harmful to you. 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. So the myth of "soot free soy candles" is not only inaccurate, but simply an effort by some companies to scare the general public into buying their candles.

With that being said, there are some benefits to purchasing soy wax candles. While petroleum based paraffin wax is a limited resource, soy wax is a renewable resource that is limited only by how many soybeans we can grow. It is also beneficial to farmers who sell soybean crops, as well as lasting almost twice as long as paraffin wax.

However, soy wax is naturally a "soft" wax. While container candles, tealights, and small tarts may be made entirely of soy, it is extremely difficult to make good pillar candles and votives out of 100% pure soy wax. Additives are used to make them better, but in most cases, paraffin wax is still a much better solution for those types of candles. In my own company, Mystickal Incense & More, we use a blend of 50% soy wax and 50% paraffin wax for our free-standing candles.

In the end, both paraffin wax and soy wax are both good choices for candle wax. Neither is more "environmentally friendly" than the other, as there has never been scientific evidence that paraffin wax is harmful to your health in any way at all. It is a personal choice of which type you prefer to use, and both types hold scent and dye just as well. The only benefit that there is in all reality, is that container candles using soy wax do burn longer. And it does benefit the farmers of the Mid-western United States. However, most other claims regarding soy wax are false and/or misleading.

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About the Author:
Stephanie Davies is a 27 year old Missourian with a loving husband and an 8 year old son. She currently owns her own business, Mystickal Incense & More, and sells handmade candles, incense, bath & body products and more at http://www.mystickalincense.com
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1. Jonathon Alcoser (23:38, 15.01.2008)
You are very GROSSLY misinformed about paraffin and crystaline waxes. You should first start at the EPA\\\'s website and review their findings about \\\'harmless\\\' paraffin waxes. When your done their please proceed to State Farms and USAA Insurance website or here http://www.insure.com/home/candles.html and see what they have to say about soot produced from paraffin candles and $200,000 in claims. And if thats not enough, this is a small excert of the EPA\\\'s findings Titled: \\\"Candles and Incense As Potential Sources of Indoor Air Pollution: Market Analysis And Literature Review, \\\" dated Jan. 2001.



Candle Soot

Black Soot Deposition (BSD) is also referred to as ghosting, carbon tracking, carbon tracing, and dirty house syndrome. Complaints of BSD have risen significantly since 1992 (Krause, 1999).

Black soot is the product of the incomplete combustion of carbon-containing fuels. Complete combustion would result in a blue flame, and would produce negligible amounts of soot and carbon monoxide. Until recently, the source for the black soot in homes was unknown.

Through interviews and recent experiments, it is now believed that frequent candle burning is one of the sources of black soot. The amount of soot produced can vary greatly from candle to candle. One type of candle can produce as much as 100 times more soot than another type
(Krause, 1999). For example, elemental carbon emission rates varied from less than 40 to 3,370 µg/g candle burned in a study of sooting behavior in candles (Fine et al., 1999). The type of soot may also vary; though primarily composed of elemental carbon, candle soot may include phthalates, lead, and volatiles such as benzene and toluene (Krause, 1999).

Scented candles are the major source of candle soot deposition. Most candle wax paraffins are saturated hydrocarbons that are solid at room temperature. Most fragrance oils are unsaturated hydrocarbons and are liquid at room temperature. The lower the carbon-to-hydrogen ratio, the less soot is produced by the flame. Therefore, waxes that have more fragrances in them produce more soot. In other words, candles labeled \\\"super scented\\\" and those that are soft to the touch are more likely to generate soot.

The situation in which a candle is burned can also impact its sooting potential. A small and stable flame has a lower emission rate than a larger flickering flame with visible black particle emissions (Vigil, 1998). A forced air flow around the flame can also cause sporadic sooting behavior (Fine et al., 1999). Thus, candles in glass containers produce more soot because the container causes unsteady airflow and disturbs the flame shape (Stephen et al., 2000). Candles that are extinguished by oxygen deprivation, or blowing out the candle, produce more soot than those extinguished by cutting off the tip of the wick. Cutting the wick eliminates the emissions produced by a smoldering candle (Stephen et al., 2000).

When soot builds up in air, it eventually deposits onto surfaces due to one of four factors. First, the particle may randomly collide with a surface. Second, soot particles can be circulated by passing through home air-conditioning filters. Third, soot can gain enough mass to become subject to gravity. Homes with BSD often have carpets stained from soot deposition (Vigil, 1998). Finally, the particles are attracted to electrically charged surfaces such as freezers, vertical plastic blinds, television sets, and computers (Krause, 1999).

When soot is airborne, it is subject to inhalation. The particles can potentially penetrate the deepest areas of the lungs, the lower respiratory tract and alveoli (Krause, 1999). ERG did not find research literature on the health effects of residential exposure to candle soot.

Conclusion

Candles with lead wicks have the potential to generate indoor airborne lead concentrations of health concern. It is also possible for consumers to unknowingly purchase candles containing lead wick cores and repeatedly exposes themselves to harmful amounts of lead through regular candle burning.

Lead wicks aside, consumers are also exposed to concentrations of organic chemicals in candle emissions. The European Candle Association (1997) and Schwind and Hosseinpour (1994) conclude that there is no health hazard associated with candle burning even when a worst-case
scenario of 30 candles burning for 4 hours in a 50 m 3 room is assumed. However, burning several candles exceeded the EPA\\\'s 10 -6 increased risk for cancer for acetaldehyde and formaldehyde, and exceeded the RfC for acrolein. Once again, the RfC and EPA\\\'s 10 -6 increased cancer risk guidelines are not designed specifically for indoor air quality issues, so these conclusions are subject to interpretation.

Consumers may also not be aware that the regular burning of candles may result in BSD, causing damage to their homes. Sooting can be reduced by keeping candle wicks short, drafts to a minimum, and burning unscented candles.

hmmmmmm.....\\\'soot is in fact not harmful to you\\\'
0
2. msgoodygal (23:05, 01.03.2008)
Hold on a minute there, Jonathan. What part of THIS don't you understand?

Lead wicks aside, consumers are also exposed to concentrations of organic chemicals in candle emissions. The European Candle Association (1997) and Schwind and Hosseinpour (1994) conclude that there is no health hazard associated with candle burning even when a worst-case scenario of 30 candles burning for 4 hours in a 50 m 3 room is assumed.

Oh, and by the way, your 'link' to the insurance site doesn't work.

And if you also read that EPA account, you will see that there are NO tests to confirm that soot has negative affects on the respiratory system.

In addition, there are additives that go into the soy candle production process, it is not pure soy. Soy is a very SOFT wax, and requires hardeners (ie: chemicals).

The soot is produced by oils, the same amounts and the exact same oils are added to soy candles that are added to paraffin waxes.

Other chemicals that can be added, like paraffins, are UV prohibitors.

Soot, IS MESSY, and ALL candles soot. Soy is no miracle candle - well, maybe a miracle for the soy farmers and soy candle makers if we can pass off all this erroneous information by pulling the wool over the eyes of consumers.

Are you working in the soy candle industry or the soy farming industry?
0
3. cj (14:11, 13.05.2008)
I am a soy candle maker, and I will have to say that I have never seen any Black soot on anyone of my hand poured soy candles. & lead wicks are mostly out lawed in most of your states. I know in mine they are. just thought i would pass this information along as I am always researching my product.
+1
4. Wendy (12:11, 08.06.2008)
Soy candfles ARE BETTER for the environment because they are NOT made of crude oil....

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