What is Sorption curve: water activity and moisture content Meter working principle ( one of many methods) Hair hygrometer to measure relative activity Diy using digital hydrometer Aqualab: Role of Water activity in coffee , ie molding, or mycotoxins Primecoffea , helenacoffee is quoting misleading SCA figures from SCA 's "washed arabica green coffee defect poster". But i think this is general guideline, rather than the rule, or standard. ICO : different export countries have different national quality standards Eg Colombia: <12% Rwanda: 10-12.5% Uganda: <12.5% Italy: <13% (incoming) China: <12% SCAA: 9-13 % from FAO , coffeeresearch Some examples from panama geisha beans in a particular year, with scores of 88 or higher: 8.2 to 11.2 % ( Some ) ICO say in general, range of moisture content is 8 to 12.5% Toper Unified Grain Moisture Algorithm (UGMA) Reference: Sciendo impact of the roast level on chemical composit...