Dark Room Fermentation (DRF) is a coffee fermentation method carried out in a closed, low-light (dark) environment, with more stable temperature and humidity control compared to traditional natural fermentation. This method still belongs to the natural process family, but it applies a more controlled and experimental approach to fermentation. Flavor Characteristics Dark Room Natural typically produces a fruit-forward profile with high sweetness, complex acidity, a juicy body, and winey or fermented fruit aromas—yet cleaner and more refined than conventional natural processes.
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