How to Evaluate Natural Fragrance Ingredients

Evaluating a natural material properly takes days, not minutes. Most poor purchasing decisions in this category come from compressing that.

Blotter technique

1. 01Dip a clean blotter roughly one centimetre into the material. Do not saturate it.
2. 02Label immediately with material, lot reference and time. You will not remember.
3. 03Assess the top note within the first minute, then leave it.
4. 04Return at 15 minutes, one hour, four hours, 24 hours and 48 hours.
5. 05For tenacious materials — agarwood, orris, labdanum — continue to a week.

Assess in a neutral space without competing odours, and never assess more than a handful of materials in a session. Olfactory fatigue sets in faster than most people believe.

Assess in dilution as well as neat

Many naturals are misleading neat. Indolic florals in particular can read as unpleasant at full strength and become beautiful at one percent. Assess at the concentration you will actually use.

Comparative evaluation

Absolute judgement is unreliable; comparison is far more robust. Always assess a new material against a known reference, ideally one you have used in production. Differences that are invisible in isolation become obvious side by side.

What you are looking for

• Consistency with the declared species and origin.
• Absence of solvent, plastic or rancid notes that suggest poor storage or handling.
• Tenacity appropriate to the material type.
• Behaviour in your actual formulation base, not just on a blotter.
• Any note that seems too clean, too linear or too loud — often a sign of addition.

Combining sensory and analytical assessment

GC-MS and blotter evaluation answer different questions and neither substitutes for the other. Analysis can confirm the profile is consistent with the species and free of common adulterants. Only your nose can tell you whether the material will work in your composition.