How to preserve your hydrosols and extracts (part I)

Hydrosols and plant extracts are indispensable in natural cosmetics but they always bring a risk of contamination with themselves.

Commercial extracts and hydrosols are usually preserved and good to use but a huge part of artisanal formulators prefer to prepare their own hydrosols and plant extract (which is often one of the most rewarding parts of the formulation). The question is:

What to do with your extracts and hydrosols?

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