Continuing to work on a Frankincense anti aging/wrinkle crème and a Frankincense rejuvenating mask from the (post distillation) gum and resin residue of different types of Frankincense. Here I am distilling the essential oils from Frankincense, Boswellia species.
By “post distillation” I mean that after distilling off the essential oils, what I am left with are the water-soluble gum and alcohol-soluble resin.
Since essential oils can irritate the skin, especially of the face, post distillation allows me to add a controlled amount of essential oils of my choice, isolate the water-soluble gums from the alcohol-soluble resins and remove all extraneous materials from them.
The method for distillation is steam/hydro distillation using a simple home-made pot still.
The oleo-gum-resin for this distillation is Frankincense from Ethiopia. Because this is an experiment I only used 2 kg. of resin. Much less than this still can process.
The ratio of essential oils in each type of Frankincense varies greatly. One can collect anywhere from 10 ml. up to 60 ml. or more from 2 kg. of raw oleo-gum-resin.
The sieve keeps the resin from sitting on the bottom of the pot where it could burn. If the resin did get burned, even slightly, the fragrance of all the components would be affected, making resin, gum, oil and residue in the still, unusable for any purpose whatsoever and no way to reclaim them or separate the burnt odor from them. In fact, on top of the loss of the material, the whole still, including over 8 feet of air-cooled copper condenser would have to be scrubbed and practically sterilized to make sure there was not the slightest remnant of burnt residue or odor in the whole distillation train. I shudder at the thought!!! I had already done this twice prior to distilling the Frankincense just the day before. First removing traces of the last essential I had distilled, then had to do it all over again because I could smell hints of cleaning products in the condenser when I turned up the heat and started the distillation process.
The lesson here, I believe, is that there are benefits to using standard glass water cooled condensers. I love the fact that this one utilizes air and consumes no resources to function. But it has its drawbacks.
This is a photo of the resin after distilling. Note the change in colour and texture. A pool of gum has settled at the bottom of the sieve, trying to drip into the pot through resin clogged sieve holes. Also note the milky white colour of the water after it has dissolved some of the the water soluble gums.
Now that the essential oil is distilled from the oleo-gum-resin, most of the resin is in the basket. Except for some that dripped through the sieve and formed the tastiest looking layer of caramel coloured resin on the bottom of the pot.The water in the pot is white from dissolved gum. What remains is to separate the rest of the gum from the resin, (using water as the solvent), then remove all extraneous materials, pieces of bark, stone, sand etc., and purify the components.
When gum and resin are separated and purified they will be recombined in an emulsion with the addition of emollient and skin nourishing oils, antioxidants, and a small amount of broad spectrum preservative.
Even though the prototypes and first formulas seem to have kept well for months without obvious spoilage or mold. And even though i have a deep respect for the preserving qualities of tree oleo resins. I can’t take the chance of bacteria or other organisms growing after making an oil/water emulsion.