What are the Yunnan coffee Extra Grade 2 requirements?
Extra Grade 2 for Yunnan coffee beans is defined by a set of measurable requirements. Particle size must reach 7.1 mm, broken beans may not exceed 10 percent, discolored beans are capped at 2.0 percent, and foreign matter at 0.1 percent. Moisture stays at or below 12.5 percent, ash at or below 4.2 percent, and water extract at 20.0 percent or higher.
Chemical and hygiene limits complete the picture: caffeine at or below 1.2 percent, total sugar at or above 9.0 percent, protein at or above 11.0 percent, and crude fiber at or below 35.0 percent. Arsenic, lead, copper, BHC, and DDT all have strict ceilings, with the last two not detected. These indicators help buyers judge green bean coffee quality before roasting.
Yunnan, as China's main coffee-producing region, has a coffee bean grading system that is crucial for quality control. What tier does Extra Grade 2 occupy? This article breaks down the specific requirements for Yunnan coffee beans Extra Grade 2 one by one, from appearance and sensory characteristics, physical indicators, chemical indicators to hygiene standards, including hard data such as particle size 7.1mm, broken beans not exceeding 10%, and moisture ≤12.5%. Understanding these standards can not only help you judge coffee bean quality, but also help you make wiser choices when purchasing. Front Street Coffee will also share related product information in the article, suitable for coffee enthusiasts who want to gain a deeper understanding of the grading logic of Yunnan beans.
Extra Grade 2
Appearance and Sensory Characteristics
Item Requirements
Extra Grade 2
The sensory aroma, flavor, and mouthfeel are all very good.
Appearance should be light blue or light green.
Physical Indicators
Item Extra Grade 2 (7.1mm) Testing Method
Particle size/ > ， %90DB53/T 154.6
Broken beans/ (%) ， ≤10DB53/T 154.8
Discolored beans/ (%) ， ≤2.0DB53/T 154.8
Foreign matter/ (%) ， ≤0.1DB53/T 154.8
Chemical Indicators
Item Indicator Testing Method
Moisture (%)≤12.5ISO1447
Ash (%)≤4.2GB/T5009.4
Water extract (%)≥20.0GB/T8305
Caffeine (%)≤1.2GB/T16344
Total sugar (%)≥9.0GB/T16286
Protein (%)≥11.0GB/T5009.5
Crude fat (%)≥5.0GB/T5009.6
Crude fiber (%)≤35.0GB/T5009.10
Hygiene Indicators
Item Indicator Testing Method
Arsenic (as As, mg/kg)≤0.5GB/T5009.11
Lead (as Pb, mg/kg)≤0.5GB/T5009.12
Copper (as Cu, mg/kg)≤20.0GB/T5009.13
BHC (mg/kg)Not detectedGB/T5009.19
DDT (mg/kg)Not detectedGB/T5009.19
The above is the complete content of the Extra Grade 2 grading standards for Yunnan coffee beans. For coffee enthusiasts, understanding these indicators helps judge the quality tier of the beans. In daily roasting and product selection, Front Street Coffee also refers to such grading data to ensure stable output. If you want to further understand the flavor performance of Yunnan beans, you can follow Front Street's related product recommendations.
The above content is compiled by CoffeeHunters, a coffee news website.
