COFFEE WIKI

Defects

QUALITY CONTROL

Primary and secondary defects are clearly defined by the Specialty Coffee Association.


Absolutely no primary defects are allowed. Secondary defects are allowed in very small quantities: 5 defects per 350g of green beans, as these do not have a significant impact on the cup scoring.


An assortment of defects including parchment, insect damage, and full black

Primary Defects
Full Black
predominantly opaque black beans
Full Sour
predominantly reddish/yellowish brown
Dried Pod/Cherry
bean partially/fully enclosed in dark husk
Fungus Damaged
shows yellowish/brownish fungal attack
Foreign Matternon-coffee items like sticks or stones
Severe Insect Damage3+ insect perforations
Secondary Defects
Partial Black
less than 1/2 opaque black
Partial Sour
less than 1/2 reddish/yellowish brown
Parchment
partially/fully in dried parchment
Floater
light colour, low density
Immature/Unripe
underdeveloped, greenish with silverskin attached
Withered Bean
light green with wrinkled surface
Shell 
a malformed bean, only the outside
Broken/Chipped/Cut
fragment or cut bean
Hull/Husk part of a dried cherry/husk
Slight Insect Damageless than three insect perforations
Primary Defects
Full Black
predominantly opaque black beans
Full Sour
predominantly reddish/yellowish brown
Dried Pod/Cherry
bean partially/fully enclosed in dark husk
Fungus Damaged
shows yellowish/brownish fungal attack
Foreign Matternon-coffee items like sticks or stones
Severe Insect Damage3+ insect perforations
Secondary Defects
Partial Black
less than 1/2 opaque black
Partial Sour
less than 1/2 reddish/yellowish brown
Parchment
partially/fully in dried parchment
Floater
light colour, low density
Immature/Unripe
underdeveloped, greenish with silverskin attached
Withered Bean
light green with wrinkled surface
Shell 
a malformed bean, only the outside
Broken/Chipped/Cut
fragment or cut bean
Hull/Husk part of a dried cherry/husk
Slight Insect Damageless than three insect perforations