Antonio Mcgowan
When making candles, it is important to know the correct ratio of fragrance to wax to ensure optimal scent throw without compromising the stability of the candle. This ratio is referred to as the fragrance load and it depends on various factors such as the type of wax, the flashpoint of the fragrance oil, and the desired strength of the scent. The general rule of thumb is to use between 5-10% fragrance load, with the specific percentage depending on the maximum capacity of the chosen wax. For example, paraffin wax typically has a maximum fragrance load of 10%, while soy wax can vary between 1-2 ounces of fragrance per pound of wax. It is important to test different ratios and do test burns to find the right balance of fragrance and wax for your candles.
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What You'll Learn
The type of wax matters
The type of wax you use matters when creating candles with specific fragrance loads and scent throws. While the standard fragrance load is 6% or 10% fragrance oil per pound of wax, each type of wax has a different maximum fragrance load percentage. For example, Golden Brands 464 Soy Wax has a maximum fragrance load of 10% or 1.6 ounces per pound of wax, while paraffin waxes can typically hold a maximum of 10%.
The type of wax you choose will depend on the type of candle you want to make, your budget, how strong you want the fragrance to be, and how eco-conscious you want your candle to be. Paraffin wax, for instance, is the most common and least expensive type of wax. It holds fragrance and colour well, making it a popular choice for many candle brands. However, it is derived from the oil industry, which means it is not very eco-friendly, and it produces more soot than other types of wax.
Soy wax, on the other hand, is a more eco-friendly alternative to paraffin wax, offering a slow, steady burn. However, it is more difficult to work with as it is temperamental with temperature changes and can shrink and 'frost' with white spots. Additionally, soy wax doesn't hold as much fragrance as other waxes, and it is picky about the fragrance oils that work well with it.
Beeswax is another natural option with a sweet honey scent of its own. It is harder and more solid, making it perfect for crafting unscented pillar candles. However, beeswax doesn't hold or throw fragrance as long as some other types of wax, and it is not vegan.
Coconut wax is a newer, increasingly popular option that is harvested from high-yield, sustainable coconuts. It burns cleanly with minimal soot and is excellent at holding both fragrance and colour.
Ultimately, the type of wax you choose will depend on your specific needs and preferences. Each type of wax has its own unique properties that will affect its performance and the way it scents your space.
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The flashpoint of the fragrance oil
The flashpoint of a fragrance oil is the temperature at which the oil becomes flammable and can ignite when exposed to an open flame or ignition source. This information is crucial for ensuring safety during the handling, storage, transportation, manufacturing, and application of fragrance oils. By understanding the flashpoint, users can take the necessary precautions to avoid fire hazards and accidents.
Different fragrance oils have different flashpoints, and this information is typically provided by the manufacturer on the product page, packaging, or website. For example, FedEx considers a product safe for shipping if it has a flashpoint of 100°F or higher, while USPS has stricter regulations, requiring a flashpoint of 140°F or higher.
When using fragrance oils in candle-making, it is essential to select oils with a flashpoint higher than the maximum temperature reached during the candle's burning process. This ensures that the oil does not contribute to the risk of flammability. However, it is important to note that adding too much fragrance oil to the wax can create a fire hazard, as excess oil may come into direct contact with a spark or open flame. Therefore, it is recommended to always check the maximum fragrance oil retention of the wax and not exceed the recommended amount.
The flashpoint of a fragrance oil is also important for determining its suitability for various applications. Fragrances are typically made of multiple ingredients, each with its own unique flashpoint. During any manufacturing process or application that involves heat, the ingredients with the lowest flashpoint will usually burn off first. This knowledge can help users understand why certain fragrance notes may be more challenging to achieve in specific applications, such as citrus notes in laundry due to the low flashpoint of the ingredients.
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The strength of the scent
The fragrance load, or the percentage of fragrance oil in the wax, is usually between 5% and 10%. However, it is important to refer to the specific type of wax being used, as each wax has a different maximum capacity. For instance, Golden Brands 464 Soy Wax has a maximum fragrance load of 10% or 1.6 ounces per pound of wax. Using too much fragrance oil can result in candles with dry or lumpy wax or even affect the candle's ability to hold a flame.
The temperature at which the fragrance is added to the wax can also impact the strength of the scent. This is because warmer fluids tend to release more vapors into the atmosphere, while cooler liquids retain their vapors. The flashpoint, or the temperature at which a fluid gives off enough vapors to ignite, is an important consideration when mixing fragrance oil with wax. However, it is worth noting that the flashpoint temperature of the fragrance oil will not cause it to ignite when mixed with hot wax, but only when exposed to an open flame.
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The temperature at which the fragrance is added
The temperature at which fragrance is added to wax is an important consideration when making candles. While the specific ideal temperature is not specified, there are a few guidelines and factors to consider.
Firstly, it is important to note that the warmer a fluid is, the more it tends to release vapours into the atmosphere, while cooler liquids hold their vapours better. This is relevant because fragrance oils are fluids, and when they are added to hot wax, they can release vapours that may ignite if exposed to an open flame. However, this is not a significant concern when mixing fragrance oil with wax, as the vapours will not ignite without a true ignition source, such as a lit match.
The flashpoint of a fragrance oil is the temperature at which it gives off enough vapour that an open flame could ignite it. This information can be found on the Safety Data Sheet (SDS) of the fragrance oil. While the flashpoint does not need to be a primary concern when mixing with wax, it is still important to be aware of it to ensure safety.
Another factor to consider is the fragrance load, which is the percentage of fragrance that the chosen wax can hold. Using too much fragrance can result in candles with dry or lumpy wax or even candles that do not hold a flame. The fragrance load can vary depending on the type of wax, with paraffin wax having a maximum load of 10% and soy wax varying between 1% and 2% per pound of wax. Therefore, it is important to refer to the specific recommendations for the type of wax and fragrance being used.
Additionally, it is worth mentioning that the fragrance load can be adjusted to personal preference and the desired strength of the scent. A general rule of thumb is to start with a lower percentage, such as 6%, and increase it if a stronger scent is desired. Testing different percentages and types of wax and fragrance through small samples can help determine the optimal combination.
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The maximum fragrance load
The fragrance load for candles is usually expressed as a percentage and typically falls between 5% and 10%. However, some sources suggest that 6% fragrance load is a good starting point, and it can be adjusted upwards if a stronger scent is desired. It is worth noting that beeswax has a natural honey-like scent, so additional fragrances may not be necessary for this type of wax. If a fragrance is desired, it is recommended to cut the beeswax with tallow, which is a better carrier of scent.
The amount of fragrance oil added to a candle depends on several factors, including the type of wax used, the flashpoint of the fragrance oil, and the desired strength of the scent. The flashpoint is the temperature at which a fluid gives off enough vapour to ignite with an open flame. While this is not a concern when mixing with wax, as the wax temperature will not reach the flashpoint, it is important when burning the candle, as the vapours from the fragrance oil will be released and can ignite.
To ensure optimal scent throw without compromising the stability of the candle, it is crucial to calculate the correct fragrance load. A fragrance load calculator can assist in determining the optimum amount of wax and fragrance required. This calculation considers the number of candles to be produced, the container size, the fragrance load percentage, and the wax gravity. By inputting these variables into the calculator, candlemakers can determine the precise amount of wax and fragrance needed to achieve the desired results.
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Frequently asked questions
The fragrance load is usually between 5-6% but can go up to 10% depending on the type of candle wax you are using.
No, you do not need to dilute fragrance oils before adding them to the wax.
The best method is to calculate the fragrance load. This is the percentage of fragrance that your chosen wax can hold. Using too much fragrance can result in candles with dry or lumpy wax or even produce candles that do not hold a flame.
The calculation depends on the type of wax, the flashpoint of the fragrance oil, and the strength of the scent.
The flashpoint is the temperature at which a fluid gives off enough vapors to ignite with an open flame.
