WASHED PROCESS
After the coffee cherries have been picked, the cherries are depulped (skin removed) or demucilaged (skin and pulp removed).
The coffees are typically then held in “fermentation tanks” for 12–72 hours, allowing for a gentle controlled fermentation to cause any remaining pulp to separate from the beans. Fermentation may occur from the moment of harvest until the seeds reach an inhospitable moisture content for them (11% moisture)
The beans are finally dried for up to 15 days on patios, raised beds, or in parabolic dryers until the ideal moisture content is reached.
Typically washed coffees have clean, articulate flavours; caramel or sugary sweetness; a wide spectrum of fruit acidity depending on other factors; capable of bright, crisp notes.
ANAEROBIC/ ANOXIC FERMENTATION
By sealing the cherries, either pulped or whole in an oxygen free environment (anoxic) it causes the microbes and yeasts to convert sugars and acids in the coffee’s mucilage into different acids, CO2, ethyl alcohol, and other compounds. The beans will ferment somewhat differently depending on whether they are washed, naturals, or honeys, therefore leading to a variety of fruit and candy-like flavours.