// Definition
A post-processing filtration technique used in hydrocarbon cannabis extraction where crude extract is passed through columns of filter media (typically silica, activated alumina, bleaching clays, or activated carbon) to remove undesirable pigments, waxes, and impurities, producing a lighter-colored, cleaner-looking concentrate. CRC can improve visual appeal but has been controversial for potentially masking poor-quality starting material.
// From the Episode
Evolved Extraction specializes in advanced CRC. The episode discussed CRC's role in the broader extraction toolkit. Some in the solventless community view CRC skeptically as cosmetic rather than quality-enhancing. Discussion of how CRC removes TPS (total terpene spectrum) and the tradeoffs involved.