What is washed coffee processing?

Washed processing - also called wet processing - is the most common method for producing specialty-grade green coffee. It involves mechanically removing the cherry skin through pulping, then fermenting the pulped beans to break down the remaining mucilage and washing them clean before drying.

The key steps: sorting and floating cherry (removing defects at intake), pulping (removing the outer skin), fermenting (12–72 hours in tanks while enzymes and bacteria break down mucilage), washing (rinsing the beans completely clean), and drying on raised beds or patios to 10–12% moisture.

Washed processing is valued in specialty coffee for producing a clean cup - one that expresses the intrinsic character of origin and variety clearly, without the heavy fruit overlay of natural processing. When fermentation is well managed it adds complexity and brightness; when poorly managed it introduces off-flavours. The transparency of a good washed coffee is both its defining quality and a direct reflection of the processing care behind it.