Katrina Rosales
Fixatives are essential ingredients in perfumery, used to increase the longevity of a fragrance by reducing the rate of evaporation of the more volatile materials in the composition. They are substances that equalize the vapour pressures of the raw materials in a perfume oil, thus increasing the odour tenacity. Fixatives can be natural or synthetic and are chosen to manipulate the aroma and longevity of the perfume. Natural fixatives include resinoids, which are additives secreted from plants that produce a thick, sticky resin. Synthetic fixatives, on the other hand, are substances of low volatility and include dipropylene glycol and benzyl salicylate.
| Characteristics | Values |
|---|---|
| Purpose | To preserve the original state of various materials and prevent decomposition, deterioration, and evaporation. |
| Function | Equalize vapour pressures and increase odour tenacity. |
| Result | Increase the time for which the scent of a perfume lasts. |
| Types | Natural (resinoids, terpenoids, polycyclic ketones), Synthetic (substances of low volatility, odorless solvents) |
| Examples | Benzoin, Labdanum, Musk, Sandalwood, Oakmoss, Vanilla Bean, Amber, Civet, Castoreum |
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What You'll Learn
The role of fixatives in perfumes
Fixatives are essential ingredients in creating successful perfumes. They are substances used to equalize the vapour pressures and thus the volatility of the raw materials in a perfume oil, thereby increasing the perfume's odour tenacity. In other words, fixatives increase the duration of a perfume's scent.
There are both natural and synthetic fixatives. Natural fixatives are additives used in many perfumes and cosmetic products. They are secreted from plants that produce a thick, sticky substance known as resin. Some examples of natural fixatives include benzoin, frankincense, myrrh, olibanum, storax, tolu balsam, and vanilla. Synthetic fixatives, on the other hand, include substances of low volatility, such as diphenylmethane, dipropylene glycol (DPG), and ambroxide. Synthetic fixatives are often used in place of natural fixatives derived from animals, as these are more economical, consistent, and ethical.
Fixatives are chosen carefully by perfumers to manipulate a fragrance's aroma and longevity. They act as a base in perfumes, helping to anchor the oil's fragrance and slow its release. This results in a longer-lasting fragrance that stays on the skin or clothing for a prolonged period.
Some fixatives, such as sandalwood, oakmoss, and vanilla bean, are base notes that serve as effective fixatives. These fixatives blend seamlessly into a perfume, enhancing its overall scent impression. It is important to note that fixatives should not be added impulsively or as an afterthought, as they are crucial to the performance and longevity of a perfume.
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Natural vs synthetic fixatives
Natural fixatives are additives used in many perfumes and cosmetic products. They are secreted from plants that produce a thick, sticky substance known as resin. Natural fixatives include benzoin, frankincense, myrrh, olibanum, labdanum, storax, tolu balsam, castoreum, musk, and civet. They can also fall under the category of tinctures, gums, powders, and sometimes herbs.
Natural fixatives like ambergris and civet were once widely used to increase the longevity and stability of perfumes. However, due to the risk of animal extinction, strict environmental protection laws have been implemented, and these fixatives are rarely, if ever, used today.
Synthetic fixatives, on the other hand, are substances with low volatility and virtually no odor. They are often used as sustainable and ethical alternatives to natural fixatives. Synthetic fixatives include dipropylene glycol, cyclopentadecanolide, and benzyl salicylate.
One powerful synthetic fixative is known as Fixative BMV, which is almost odorless and can be used in concentrations of up to 10%. However, it is not soluble in alcohol. Other synthetic fixatives include diphenylmethane, ambroxide, and cyclo pentadecanolide.
The choice between natural and synthetic fixatives depends on various factors, including availability, sustainability, and the desired fragrance outcome. It is important for perfumers to carefully select the appropriate type of fixative to manipulate the aroma and longevity of their perfumes.
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Examples of natural fixatives
Natural fixatives are essential ingredients in perfumery, helping to retain and stabilize the aromatic components of a fragrance and ensure it lasts longer on the skin or clothing. Natural fixatives are derived from plants that produce a thick, sticky substance known as resin. Here are some examples of natural fixatives:
Cedarwood has a warm, woody, and slightly sweet aroma that helps to anchor the fragrance and provides a long-lasting scent.
Cistus, also known as rock rose, has a resinous and balsamic aroma that adds depth and complexity to a fragrance. It is one of the best fixatives for natural perfumes.
Clary Sage has an earthy and herbaceous aroma and is a popular natural fixative with anti-inflammatory properties.
Vanilla is a sweet and creamy aroma, highly popular in perfumery due to its fixative properties and ability to blend well with other fragrances. It also has qualities that are relaxing and calming.
Patchouli is a strong, earthy, and musky aroma that adds depth and complexity to a fragrance, making it an ideal base note for many perfumes.
Other examples of natural fixatives include Balsam of Peru, Oakmoss Absolute, Violet Leaf Absolute, Tonka Bean Absolute, Benzoin, Frankincense, Myrrh, Olibanum, Labdanum, Storax, Tolu Balsam, and more.
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Examples of synthetic fixatives
Synthetic fixatives are widely used in modern perfumery due to their consistency, cost-effectiveness, and ability to stabilize volatile fragrance components. They are crucial in creating a fragrance, enhancing and extending the life of perfumes. Here are some examples of synthetic fixatives:
- Ambroxan, also known as Ambroxide, is derived from sclareol and provides a rich, ambergris-like scent. It is a replacement for grey amber, which is controversial due to its derivation from the sperm whale. Ambroxan is known for enhancing the longevity of fragrances.
- Iso E Super is a popular molecule with a subtle, woody, amber-like aroma. It is used as a fixative and to add a smooth, velvety texture to a fragrance.
- Galaxolide is a synthetic musk with a clean, sweet, musky, floral, and woody scent. It is used to add depth and enhance the staying power of perfumes.
- Hedione has a fresh, jasmine-like aroma. It is a versatile fixative that lifts and prolongs the more delicate floral notes in a fragrance.
- Dipropylene Glycol, Cyclopentadecanolide, and Benzyl Salicylate are sustainable and ethical synthetic alternatives to natural fixatives.
- Fixative BMV is a powerful, almost odourless synthetic fixative that can be used at a percentage of up to 10%. Its only drawback is that it is not soluble in alcohol.
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How to add fixatives to perfumes
Adding fixatives to perfumes is a delicate process that requires careful consideration and experimentation. Here are some detailed instructions to guide you through the process:
Choose the Right Fixative
Select a fixative that complements the scent profile of your perfume. Natural fixatives, such as benzoin, frankincense, myrrh, olibanum, labdanum, storax, tolu balsam, castoreum, musk, and civet, offer a range of aromatic qualities. Alternatively, synthetic fixatives like musk or orris root powder can provide a sugary, floral, or woody scent.
Prepare the Fixative
Fixatives can be added as tinctures, gums, powders, or herbs. If using a solid fixative, grind or powder it to facilitate mixing. Ensure your fixative is of the highest quality, as low-quality ingredients can negatively impact your perfume's scent and longevity.
Mix the Fixative
There are differing opinions on when to add the fixative. Some perfumers suggest mixing it with the fragrance oil before adding alcohol, while others add it after everything else is blended. Experimentation is key. Start by mixing a small batch of your perfume with the fixative and observe the results. You can also try different fixatives and compare the outcomes.
Adjust the Concentration
Use a good concentration of fixative to ensure its effectiveness. A highly diluted fixative may weaken the overall fragrance and reduce its longevity. However, be cautious when adding large amounts of fixative, as it can alter the odor profile of your perfume. Test and adjust your formulation as needed.
Consider the Interaction with Other Ingredients
Fixatives interact with other ingredients in complex ways. Adding a fixative may not always improve the projection of the scent. Experiment with different combinations and concentrations to find the optimal balance. Remember that the fixative should enhance and support the overall fragrance, not overpower it.
Test and Refine
Creating a perfect perfume takes time and refinement. Test each batch and make adjustments for subsequent versions. Compare the performance and scent of your perfume with and without the fixative. Seek feedback and continue refining your formulation until you achieve the desired results.
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Frequently asked questions
A fixative is a substance used to equalize the vapour pressures of the raw materials in a perfume oil, increasing the perfume's odour tenacity. In simple words, fixatives make the scent of a perfume last longer.
Fixatives are key to successful perfume development. They help to retain and stabilize the aromatic components of a fragrance, ensuring that it lasts for a prolonged period on skin or clothing.
Fixatives can be natural or synthetic. Natural fixatives are resinoids, which are additives used in many perfumes and cosmetic products. Examples include benzoin, labdanum, myrrh, olibanum, storax, and tolu balsam. Synthetic fixatives include substances of low volatility such as diphenylmethane and dipropylene glycol.
The correct type of fixative must be meticulously selected to manipulate the aroma and longevity of the perfume. It is not an element that can be added impulsively or as an afterthought. It is important to compose the entire fragrance, test it, and adjust for the next version.
