A trade name used for wet-hulled SumatraIndonesians are available as a unique wet-hulled or dry-hulled (washed) coffees. Giling Basah is the name for the wet-hulling process in Bahasa language, and will have more body... ...more coffees. It is an area and a culture group as well (spelled Mandailing often) but there is not as much coffee production in this area anymore, south of Lake Toba. Mandheling coffees might have originate from anywhere in North Sumatra even in AcehThe northernmost district in SumatraL Aceh District is north of North Sumatra and produces some very classic Sumatra coffees. The center of coffee in Aceh is Lake Tawar... ...more. They are graded on flavor defects in a very loose way, so a “Grade One” Mandheling might, in fact, have many physical defects.