How long does Agarwood oil (Oud) last on your skin?

Hi friend, oud lover, oud discoverer

I often receive a similar question from SMS, WhatsApp, online chats, and email: "How long does oud oil last on my skin?"

So today, I would like to address this question.

The way oud oil manifests and lasts on different individuals' skin is influenced by many factors, some of which are particular to the unique nature of oud.

Skin Type:

Your skin type plays a crucial role in how oud oil interacts with your skin and how long its scent lasts. Oily skin, with its natural sebum, tends to hold onto the oud oil aroma longer, creating a more pronounced and enduring scent profile. On the other hand, dry skin lacks the natural oils needed to retain the fragrance, causing the oud oil scent to fade more quickly. Additionally, the pH level of your skin can affect the aromatic profile of the oud oil. For instance, a more acidic skin pH can make certain woody or resinous notes more dominant. Understanding your skin type and its pH level can help you choose the right oud oil and application technique to maximize its longevity and scent.

• Oily vs. Dry: Oud oil blends better with the natural sebum on oilier skin. This can result in a more pronounced and lasting scent. On drier skin, oud might not be as radiant or long-lasting since there's less natural oil for it to mingle with.

At the molecular level, everything we perceive as scent is due to volatile compounds interacting with olfactory receptors in our noses. The rate at which these compounds volatilize (turn into vapour) plays a significant role in how long and how well we can detect them.

Oily Skin:

• The skin's sebum (the natural oil produced by our sebaceous glands) primarily comprises triglycerides, wax esters, squalene, and free fatty acids. When oud oil is applied to oily skin, its molecules can interact and mix with these sebaceous secretions.
• This interaction effectively reduces the volatility of the aromatic compounds in Oud oil, slowing down the rate at which they evaporate. Think of it as a slow-release mechanism. The more these molecules are "trapped" within the sebum, the longer they will emit their aroma, leading to a prolonged and often more intense scent profile.
• Additionally, the fatty nature of sebum can act as a solvent, which can potentially modify the scent profile of oud, emphasizing certain notes while suppressing others.

Imagine you have shiny, glossy paper (like photograph paper). If you put a drop of coloured water on it, the colour will stay bright and won't fade away quickly. That is because the shiny paper does not let the water spread out too fast. This is like oily skin holding onto the oud aroma longer because of the natural oils on it.

Dry Skin:

Source: designundfotoar Pixabay

• Dry skin lacks ample sebum, so there's less for the oud oil to interact with. Without this layer of natural oil, the aromatic molecules in the oud are more exposed to the environment.

• As a result, the molecules tend to volatilize more rapidly, leading to a faster evaporation rate. This quick evaporation often means that the scent might not last as long on dry skin.
• Furthermore, the absence of adequate sebum means that there's no modifying agent to play with the scent profile of the oud. As such, while the scent might be truer to the original profile of the oil, it may not have the same depth or complexity as it would on oilier skin.

Now, think about a regular piece of paper from your notebook. If you drop coloured water on it, the colour will spread out and fade faster. This is similar to dry skin, which doesn't have much oil. So, the oud smell might go away more quickly.

Skin's pH Level:

The natural pH of an individual's skin can affect how oud oil smells and lasts. If someone's skin is more acidic, it might subtly change the aromatic profile of the oud, possibly making certain woody or resinous notes more dominant.

pH stands for 'potential of hydrogen' and it represents how acidic or alkaline a substance is on a scale of 0 (very acidic) to 14 (very alkaline), with 7 being neutral (like distilled water). Human skin typically has a pH value that ranges from 4.5 to 6.5, making it slightly acidic.

Chemical Interactions: 

The aromatic compounds in oud oil are composed of different molecules, each with its own chemical properties. When applied to the skin, these molecules encounter the skin's slightly acidic environment. Depending on the skin's pH, these molecules can undergo subtle chemical changes.

For instance, some aromatic molecules might become protonated (i.e., they acquire an extra hydrogen ion from the acidic environment) or deprotonated (lose a hydrogen ion). These chemical changes can alter the volatility and aroma of the molecules.

Volatility of Aromatic Compounds: 

The skin's pH can influence the rate at which certain aromatic compounds in oud oil evaporate. For example, molecules that have undergone protonation due to an acidic environment might have altered volatility, changing how quickly they evaporate and, thus, the perceived intensity and longevity of the scent.

Modification of Scent Profile: 

The interaction between the skin's pH and the aromatic compounds can lead to shifts in the scent profile. Some notes might become more pronounced, while others might recede. For instance, as mentioned, more acidic skin could emphasize the woody or resinous notes of the oud, possibly due to the way specific compounds in these notes react to the skin's acidity.

Solubility of Aromatic Compounds: The solubility of certain compounds in oud oil might be affected by the pH. If a molecule becomes more soluble due to the skin's pH, it might interact more with the skin's moisture and oils, which can lead to a shift in how the scent is released and perceived.

Environmental Factors and Oud Oil:

1. Dry Weather:
   • Oud oil dries up faster.
   • You will mostly notice the lighter, fresh smells of the oud because they evaporate quickly.
   • Because the skin doesn't have much moisture, you'll get a clear and direct smell of oud.
2. Humid Weather:
   • Oud oil stays on longer because of all the moisture in the air.
   • You will feel the deeper, woodier aroma more because they stick around while other lighter top notes are subdued.
   • Since our skin is moist in this weather, the oud oil might mix with sweat, changing how it smells a bit.
   • Ideal condition for bacteria growth which is in our sweat, this will change the oud notes also.
3. Balanced (or Middle) Weather:
   • Oud oil evaporates at a regular pace.
   • You'll experience both the light and deep smells of oud, giving you a full journey of its scent.
   • The skin is neither too dry nor too moist, making oud smell just right.

In simpler terms: Think of oud oil as a musical band. In dry weather, the lead singer's voice (lighter smell) stands out but does not last long. In humid weather, the background instruments (deeper smells) dominate, and the lead voice might get drowned out a bit. In balanced weather, the entire band plays in harmony, and you get to enjoy the complete song!

Here is the summary 

Summary

Oud oil's duration on skin can vary widely, ranging from as short as 30 minutes for some individuals to lasting eight hours for others due to the above factors.

Application Techniques for Oud Oils

Applying oud oils can be an art in itself, with various techniques offering different benefits. The "swipe" method involves applying the full length of the applicator to the skin in a linear motion, allowing for a broad distribution of the oil. This technique is ideal for those who prefer an even, balanced scent experience.

The "dot" method, on the other hand, involves applying a small amount of oil to a specific spot, which is perfect for a more concentrated scent. This approach is particularly useful for those who prefer a subtle yet long-lasting fragrance.

Another popular technique is the "roll" method, where you roll the applicator while in contact with the skin. This is perfect for spot distribution or therapeutic use, as it allows for precise application in targeted areas.

Experimenting with these different application techniques can help you discover the method that works best for you, ensuring you get the most out of your oud oil experience.

Maximising the Life of Oud Oil

Proper storage and application are key to ensuring your perfume oil lasts as long as possible. To preserve the integrity of your oud oil, store it away from direct sunlight, heat, and moisture, as these elements can cause the oil to degrade over time.

Choosing high-quality oil that is free from additives and preservatives is crucial in maintaining its purity and potency. When applying the oil, use it in moderation and avoid rubbing it into the skin, as this can break down the aromatic molecules and diminish the scent's longevity. Instead, dab the oil onto your skin or clothes and allow it to absorb naturally.

By following these guidelines, you can maximise the life and effectiveness of your perfume oil, allowing you to enjoy its rich and complex scent for longer periods.

Scent Etiquette and Social Zones

When wearing oud oil, it is important to consider scent etiquette to ensure you do not overwhelm those around you. The amount of oud oil you apply should vary depending on the social zone you are in.

• Intimate zones: In close settings with loved ones, you can apply the oil more liberally to share its rich aroma without being overpowering.

• Casual zones: In public spaces such as cafes or transport, it is best to apply a smaller amount to avoid overwhelming others.

• Familiar zones: In environments with colleagues and friends, a moderate application is usually appropriate to maintain a pleasant yet subtle presence.

Being mindful of those around you and adjusting your scent accordingly ensures a pleasant and respectful olfactory experience for everyone.