To obtain an absolute, the first step is to prepare a concrete. Preparing a floral concrete requires thorough knowledge of the particular plant material being processed.
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To obtain an absolute, the first step is to prepare a concrete. Preparing a floral concrete requires thorough knowledge of the particular plant material being processed.Experts have developed their own methods based on an individual understanding of the specific botanical, which is as important as any technical consideration. They also will have worked extensively with the particular hydrocarbon solvent used, which has its own qualities. Hexane is probably the most used solvent and, in the case of delicate flowers, should be purified to a point so as to only dissolve pigments, waxes and volatile oil, leaving the water content behind. Benzene is an alternative solvent used. There is a lot of water in fresh flower material, so this is a delicate process, and the water content in fresh flower material could dilute the solvent to the point of being ineffective. At this stage of extraction, alcohol cannot be used as the solvent must be volatile enough to come out of solution. The process of making concretes involves layering the flowers, insuring that they are perfect and not bruised, thinly so that the hexane or solvent can easily touch every surface. The flowers are 'washed' over and over with the hexane to draw the aromatics into solution.
Concretes are typically a solid at room temperature so we sell them by weight (grams - gm) instead of volume (ml). For use, you may need to warm them slightly to make them pourable.