Tinkturenpresse

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Styrax benzoin Dryand. - Styracaceae - Sumatra benzointree, Sumatra Benzoeharzbaum

Shrub or small tree, up to 12m high, native to Sumatra, Malaya and Java, introduced into West Africa.
http://plants.jstor.org/upwta/5_303

Benzoin resin is used as a fixative, slowing the dispersion of essential oils and other fragrance materials into the air, also in cosmetics, veterinary medicine, and scented candles. https://en.wikipedia.org/wiki/Benzoin_resin

„Since the 15th or 16th century compound tincture of benzoin has been used extensively to treat wounds, ulcers, fissures of the nipples, lips and anus, and similar conditions. For these purposes, the tincture was, and is, used as a balsam under different names (Balsam Traumatic, “baume de commandeur) and was incorporated in plasters (court plaster)… Within a relatively short period of time, three cases of acute dermatitis were observed from compound tincture of benzoin used in combination with adhesive tape dressings… An analysis of more detailed patch tests and their correlation with the constituents of compound tincture of benzoin and other balsams makes it appear probable that volatile oils and/or resins might be responsible for the dermatitis… Compound tincture of benzoin and its constituents should not be used on the skin of patients with an allergic disease or a history of allergy.“
[Investigation of Contact-type Dermatitis Due to Compound Tincture of Benzoin. Steiner, Karl, and William Leifer, Journal of Investigative Dermatology Vol.13.6, 1949, 351-359] http://www.nature.com/jid/journal/v13/n6/full/jid1949109a.html