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Current practices regarding preparation of cannabinoid products containing these components typically include subjecting the raw plant material to an extracting solvent such as ethanol to produce a bulk extract . The solvent is then removed via open evaporation , reduced pressure , or by flowing a gas stream over the surface of the bulk extract , sometimes at an elevated temperature . Issues arising from these practices include poor scalability , long processing times , destruction / evaporation of the more volatile desirable components , and difficulty in isolating or concentrating specific components .
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