Brooke Martin
Candles are ignitable wicks embedded in wax or another flammable solid, such as tallow, that provide light and sometimes fragrance. They are placed in various holders, such as candlesticks, chandeliers, or lanterns, and have been used for over two millennia. While candles were once a significant form of indoor lighting, they are now used more for functional, symbolic, and aesthetic purposes. The size of the flame and the rate of burning are controlled by the candle wick, and the type of wax used also affects the burn rate, with beeswax and coconut wax burning longer than paraffin or soy wax. When a candle is lit, the heat of the flame vaporizes the wax, and it is this wax vapour that burns. Candles can be oriented vertically or horizontally, with the wick needing to be absorbent to pull the liquid wax upward while the candle is burning.
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What You'll Learn
- Candles are made from wax, tallow, or another flammable solid
- A candle's wick must be absorbent to draw liquid wax upwards
- A candle's flame size is controlled by the type of wick
- A candle's vertical orientation impacts the rate of wax evaporation
- A candle holder or hurricane protects surfaces from dripping wax
Candles are made from wax, tallow, or another flammable solid
Candles are solid blocks of wax, tallow, or another flammable solid, with an embedded wick that can be ignited to provide light, heat, or fragrance. They have been used for over two millennia, and while electric lighting has made candles non-essential, they are still used for functional, symbolic, and aesthetic purposes.
Candles can be made from a variety of materials, including wax, tallow, gel, or plant-based waxes. The type of wax used can vary depending on the region and the availability of raw materials. For example, in the Far East, stillingia tallow and Japan wax from plants have been traditionally used, while in India, the fruit of the cinnamon tree is boiled to create wax. In ancient Egypt and Rome, tallow rendered from animals was commonly used, while in China, beeswax was used in ancient times.
Tallow is a cheap and easily available material that was widely used for candles for centuries. However, it produces an unpleasant smell and smoke. In contrast, beeswax candles burn brighter and longer, with less smoke and a more pleasant fragrance. However, beeswax was more challenging to obtain, making beeswax candles more expensive and limited to the wealthy and churches.
The development of new waxes for candles has been driven by the availability of raw materials, the ease and cost of processing these materials into suitable wax, and the desirability of the wax compared to other options. In the 19th century, the whaling industry led to the creation of spermaceti wax, which burned cleanly and had a low odour. This was later replaced by stearin wax and paraffin wax, which became the standard candle wax in the Western Hemisphere due to its affordability and clean burn.
Today, paraffin wax is the most commonly used candle wax globally, followed by beeswax, soy wax, palm wax, gels, and synthesized waxes. These waxes are used alone or in blends, and all burn cleanly, safely, and in the same manner when provided in high-quality formats. The size of the flame and the burn rate of a candle are controlled by the wick, with the type of wax also influencing the burn rate.
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A candle's wick must be absorbent to draw liquid wax upwards
A candle is a solid block of wax with an embedded wick that can be lit and burned for a long period. The wick of a candle is a crucial component that enables the candle to burn for an extended period. The wick must be made of a material that is naturally absorbent, similar to a towel in terms of absorbency. This absorbency is essential because the wick needs to absorb the candle's liquid wax and draw it upwards as the candle burns. The process begins when the heat from the flame melts the wax in and around the wick. The wick then absorbs this liquid wax and pulls it upwards through capillary action. The absorbed wax vaporizes due to the flame's heat, and it is this wax vapour that burns and sustains the candle's flame.
The wick's absorbency plays a vital role in this process by drawing the liquid wax upwards, ensuring a continuous fuel supply for the flame. Without an absorbent wick, the wax would not be effectively transported to the flame, and the candle would not burn efficiently, if at all. The absorbency of the wick also influences the rate of wax consumption and, consequently, the overall burn time of the candle. A highly absorbent wick will draw up more wax, resulting in a faster burn and a shorter overall burn time. Conversely, a less absorbent wick will burn more slowly and result in a longer-lasting candle.
The type of wax used in a candle also impacts the burn rate and temperature. Different types of wax, such as paraffin, soy, coconut, beeswax, and apricot, each have unique burning characteristics. For example, paraffin wax, derived from crude oil, requires high temperatures to ignite and burn. This high ignition temperature contributes to the longevity of the candle, as the wax must reach a certain temperature before combustion occurs.
Additionally, the size of the wick plays a role in the combustion process. If the wick is too large, it can produce excessive heat, causing the wax to vaporize too quickly and resulting in excessive soot and an uneven burn. Conversely, if the wick is too small, it may not generate enough heat to vaporize the wax effectively, leading to an inefficient burn and a diminished flame. Therefore, selecting the appropriate wick size is crucial to achieving optimal combustion and ensuring the desired burning characteristics.
In summary, the wick's absorbency is critical to the function of a candle as it enables the wick to draw liquid wax upwards, providing fuel for the flame. This absorbency, along with the type of wax and the size of the wick, influences the burn rate, temperature, and overall burn time of the candle. Candlemakers carefully consider these factors to create candles with the desired burning characteristics, ensuring both functionality and aesthetic appeal.
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A candle's flame size is controlled by the type of wick
A candle is an ignitable wick embedded in wax or another flammable substance, such as tallow, that provides light and, in some cases, fragrance. Candles have been used for over two millennia and were once a significant form of indoor lighting.
The wick's capillarity determines the rate at which the melted wax is conveyed to the flame. If the capillarity is too great, the molten wax will stream down the side of the candle. The wick absorbs the liquid wax and pulls it upward, where the heat of the flame vaporizes the wax, and it is the wax vapour that burns. The flame then melts the top of the wax, which moves upward through the wick to be continually burnt, thereby maintaining a constant flame.
The size of a candle's flame is controlled by the type of wick. Wicks are often infused with chemicals to modify their burning characteristics. For example, it is usually desirable that the wick does not glow after the flame is extinguished. Typical agents used for this purpose include ammonium nitrate and ammonium sulfate.
In the past, candle wicks required regular trimming to promote steady burning and prevent smoking. In 1825, a French man named M. Cambacérès introduced the plaited wick soaked in mineral salts. This type of wick curled towards the outer edge of the flame and was trimmed by the fire itself, becoming known as a "self-trimming" or "self-consuming" wick.
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A candle's vertical orientation impacts the rate of wax evaporation
The orientation of a candle, whether vertical or horizontal, impacts the rate of wax evaporation. When a candle is lit, the heat from the flame melts the wax near the wick, and this liquid wax is drawn up the wick by capillary action. The heat of the flame then vaporizes the liquid wax, turning it into a hot gas. This gas is consumed in the flame through combustion, creating heat, light, carbon dioxide, and water vapor.
The vertical orientation of a candle affects the rate at which the wax evaporates. When a candle is oriented vertically, the liquid wax drips down due to gravity, and evaporation of the wax is not observed. In contrast, when a candle is oriented horizontally, the liquid wax is heated by the flame and evaporates.
The size of the wick and the composition of the wax influence the burn rate of a candle. A larger wick provides more fuel for the flame and can result in a faster burn rate. Similarly, the type of wax can affect the burn rate, with some waxes having higher melting points and requiring more heat energy to evaporate.
The presence of fragrance oils in scented candles can also impact the rate of wax evaporation. As the wax vaporizes, it releases the infused fragrance oils, which spread into the surroundings. The type of wax and the amount of fragrance oil it can hold and release can vary, impacting the rate at which the wax evaporates and the fragrance is released.
Additionally, external factors such as airflow and temperature can influence the rate of wax evaporation. A strong airflow can blow out the flame or cause it to burn unevenly, affecting the heat available for wax evaporation. Similarly, higher temperatures can cause the wax to melt and evaporate faster, while lower temperatures can slow down the process.
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A candle holder or hurricane protects surfaces from dripping wax
When you burn a candle, it is important to take precautions to prevent the dripping wax from causing a mess or damaging surfaces. One effective way to do this is by using a candle holder or a hurricane. These accessories not only enhance the aesthetic appeal of your candle but also provide a functional purpose by catching the dripping wax.
A candle holder is a great option to protect your surfaces from wax drippings. They are typically made of heat-resistant materials such as glass, metal, or ceramic, ensuring they can withstand the heat of the candle flame and the warm wax. Candle holders come in a variety of shapes and designs, allowing you to choose one that complements your candle and your decor. Some even have a built-in plate or dish to catch the wax, providing an elegant and mess-free solution.
If you're looking for a more comprehensive protection, consider using a hurricane. Hurricanes are tall, cylindrical glass or plastic shields that enclose the candle, creating a barrier between the flame and the surrounding environment. They are particularly useful for outdoor settings or drafty areas, as they shield the flame from wind, ensuring a steady and controlled burn. The enclosed structure of a hurricane also prevents wax from escaping, keeping your surfaces clean and wax-free.
Whether you choose a candle holder or a hurricane, always ensure that the size and dimensions are compatible with your candle. The holder or hurricane should be wide enough to accommodate the candle with some extra room for ventilation, but not so large that the candle moves around or leans to one side. This ensures the candle burns evenly and reduces the risk of wax spilling over the sides.
Additionally, always place your candle on a level, stable surface to prevent accidental wax spills. By taking these simple precautions and using the right accessories, you can enjoy your candles without worrying about the mess or damage caused by dripping wax. Whether it's a cozy evening at home or a special event, a candle holder or hurricane will enhance the ambiance while keeping your surfaces wax-free and pristine.
Remember to always exercise caution when burning candles and never leave them unattended. Enjoy the warm glow and soothing atmosphere that candles create, knowing that your surfaces are protected from wax drippings with the simple addition of a candle holder or hurricane.
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Frequently asked questions
A candle is an ignitable wick embedded in wax or another flammable solid substance such as tallow. It provides light and sometimes a fragrance.
The heat of the flame vaporizes the wax, and it is the wax vapour that burns. The wick absorbs the liquid wax and pulls it upwards.
Candles are mainly made out of paraffin wax, a hydrocarbon and petroleum byproduct. However, they can also be made from beeswax, gel, or some plant waxes.
A candle is usually positioned vertically, with the wick of the candle in line with the axis of the candle.
