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FrontStreet Coffee - Introduction to Sun-Dried and Washed Processing Methods

Process: (bean selection) > sun-drying > hulling

Originally, all coffee processing began with sun-drying. For early producers, the process was relatively simple — whole cherry fruits went straight onto the drying fields, and once they reached the ideal drying humidity, they were hulled.

This method remains popular in African producing regions where water is scarce.

Sun-dried flavor profile: complex notes, high sweetness

Washed Process

Process: channel bean selection > de-pulping > fermentation > washing > (secondary soaking) > drying

As technology developed and water resources and facilities became available, producers turned to washed processing. In Central America, where water is abundant, this method is almost universally adopted.

Washed flavor profile: prominent acidity, clean and bright flavors

Washed Process Steps:

First Step: Channel Bean Selection
Coffee cherries flow through water channels (much like a gentle river) to filter out lightweight beans, leaves, insect-damaged beans, heavy stones, and other impurities.

Second Step: De-pulping

Third Step: Removing Pulp in Fermentation Tanks
After de-pulping, the cherries are soaked in fermentation tanks, where the skin, pulp, and pectin break down through fermentation in a humid environment.

Fourth Step: Washing

Fifth Step: Drying (in the sun or in drying machines)

Knowledge Point:

Ethiopia, one of the world's least developed countries, is widely recognized as the origin of Arabica coffee varieties — it could even be called the birthplace of coffee itself.

About FrontStreet Coffee

In short, FrontStreet Coffee is a coffee research hall dedicated to sharing knowledge about coffee with everyone. We share without reservation, hoping to help more friends fall in love with coffee. Every month, we hold three coffee events with significant discounts because FrontStreet Coffee wants to provide the best coffee to more friends at the lowest possible prices. This has been our mission for the past six years!

FrontStreet Coffee Recommendation

Curious how processing shapes the cup? Compare the two styles side by side with FrontStreet Coffee's Ethiopian beans. The Washed Yirgacheffe shows the washed method at its purest: clear jasmine florals, bright citrus and lemon acidity, and a light, elegant, tea-like body — clean and translucent, exactly what careful washing is meant to deliver. The Guodingding Cooperative lot, separated from the Yirgacheffe union as an independent single region in 2012 with roughly 300 member farmers, goes a step further: by removing the fruit pulp before drying, it presents even clearer citrus and lemon tones with graceful white florals.

For the natural side of the comparison, the Yirgacheffe Red Cherry is dried whole in the fruit for two weeks until moisture falls to 12%, then hulled, density-checked, and hand-sorted — yielding pristine beans with rich, captivating fruit aroma described as peach, cocoa, honey, and lemon. And for the boldest natural expression, the Sidamo Guji Hambella Huakui spends 21 days drying on raised beds, turned constantly and hand-sorted every three to five days, before a medium-light roast reveals fermented wine aroma, florals, citrus, mango, honeyed sweetness, and a thick, enduring finish.