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Giling Basah

Giling Basah is a term used by Indonesian coffee processors to describe the method they use to remove the hulls of Coffea arabica. Literally translated from Indonesian, the term means "wet grinding".

The Arabica coffee industry also uses the term "wet hulled" to describe the same process.[1]

Kuku kambing, or "goat's nail" defect caused by wet hulling.

Most small-scale farmers in Sumatra, Sulawesi, Flores and Papua use the Giling Basah process. The mature coffee fruit, referred to as the coffee cherry, is harvested. and farmers remove the outer skin mechanically using locally built pulping machines. The coffee beans, coated with mucilage, are stored for up to a day during which a natural fermentation breaks down the sticky residue. Afterwards the coffee beans, protected by a parchment hull (endocarp) are washed off before being let out to dry.

Contrary to other traditional drying methods, where the parchment coffee is dried until it reaches about 12% moisture content, the beans in the Giling Basah process are hulled when they reach between 30 and 35% moisture content; still semi-wet. The green coffee beans are then further dried to reach the exportable 12% moisture content. This operation gives the beans a unique bluish-green appearance and is thought to reduce the acidity and increase the body, resulting in the classic Indonesian cup profile.[2] The Giling Basah process also introduces additional flavours that can be vegetal or herbal, woody or musty, sometimes earthy.[3]

The Giling Basah process can create a "goat's foot," a split on one end, in green coffee beans. Sometimes the hulling machine partially crushes a soft bean, giving the bean a shape resembling a cloven hoof.

See also


  1. ^ Specialty Coffee Association of Indonesia (2008)"The Diverse Coffees of Indonesia - Speciality Coffee Association of Indonesia". Archived from the original on 2 August 2008. Retrieved 8 August 2008. Retrieved on 2008-08-08
  2. ^ Marsh, T: "Review of the Aceh Coffee Industry", page 9. UNDP ERTR Livelihood Component, 2006
  3. ^ Hoffmann, James (2018). The World Atlas of Coffee 2nd Edition. Great Britain: Mitchell Beazley. p. 169. ISBN 978-1-78472-429-0.

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Giling Basah
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