- 31st January 2010, 07:59 PM
Here's part of the quote: "However in case of sesquiterpene rich oils the story is exactly opposite. Oils like Patchouli, Vetiver, Nagarmotha etc. if sesquiterpenes are converted to there respective oxides then they are really responsible for mellodious odor of same oils. Like in case of Patchouli, alfa and beta Patchouline when converted to there oxides they give nice pleasant saffron, ambery odor.In case of Vetiver, alfa and beta vetivene gives true vetiver odor which resembles, alfa vetivone. In case of nagarmotha Cyprene which is major sesquiterpene gives series of compounds with characteristic oriental notes resembling Agarwood"
- 31st January 2010, 08:00 PM
This is in contrast to lighter weight molecules: ""Your doubt is very much valid. It holds good for many monoterpenes oil like citrus oils which are full of terpenes like Limonene which when oxidised, develop off-odor due to oxidation of same. This is the reason all citrus oils should be kept in closed containers in cool dark place."
- 31st January 2010, 08:01 PM
And an interesting note on the effects of copper on storage: "If container of oil is copper than neutralize acids in same and odor becomes more smooth and enjoyable.In olden days people use to store such precious oils in copper or even some time gold containers to capture energy from sun in same oil. We our self are seeing nice results with copper containers kept with open lid (Covered with fine cloth for seration ).During Mogul era (500 years back) storage of such oils were always in such containers. Developing such special metal containers can be interesting.""
- 31st January 2010, 08:13 PM
Yeah - I am not surprised - I get some greenish residue on bottle necks with metal caps, due to copper I suspect (verdigris, right?)