[Herbalist] Preservation of a product (was Bruise salve)

[Jenne Heise]

> First - preserve the oils in the product from oxidation; for this Vitamin E
> or benzoin gum are great and natural.  There are many others from Chemistry
> Land, but I won't go into them now.  I have no idea if Vit E or benzoin gum
> are period, although I suspect the latter is more likely to be.

Benzoin gum is a standard period ingredient: aka gum benjamin or gum
benzoin.
> >additive. I've used wintergreen (JUST A SMIDGE), and/or eucalyptus
> >oil.  Catherine has also suggested camphor, etc.
>
> I urge checking the toxicity of e.o.s carefully.  There are many people who
> are sensitive to the "warming" oils.  Clove oil is considered very
> sensitizing.  I got horrible burns from a menthol spray one time.