How to evaluate coffee like a professional cup tester?
Coffee cup testing process:
1. A 5-to 6-ounce coffee cup is recommended. The cup should be kept clean and has no obvious smell.
two。 The chromaticity after baking should be light or medium light, preferably measured by a colorimeter. The sample should be baked within 24 hours before the cup test and then placed in a sealed container for at least 8 hours.
3. The coffee beans should be ground immediately before the cup test, not more than 15 minutes from the water injection. The particles should be slightly rough, and 70% to 75% of the particles can pass through the standard American No. 20 sieve. Before water injection, cup testers should evaluate the aroma of dry powder by sniffing.
4. Generally speaking, the brewing ratio is 8.25g coffee with 150ml water, and the error is controlled within 1/4 grams.
5. The brewing water must be clean and tasteless and should not be distilled or soft water (the ideal level for total soluble solids is 125to 175PPM). The water temperature should be 200 degrees Fahrenheit and the brewing time should be 3 to 5 minutes without any stirring.
6. After the dregs are soaked, the floating coffee powder will form a "skin" on the surface. Press the powder into the bottom of the cup with a special spoon, then stir gently to smell the wet aroma coming from the rising steam. The final aroma score of coffee is a combination of dry and wet aroma scores.
7. Cool the coffee to 160 degrees Fahrenheit, pick up and throw away the coffee grounds floating on the surface, sip loudly into your mouth, make the coffee liquid fully cover the whole mouth, and evaluate its taste and aftertaste. At about 150 degrees Fahrenheit, evaluate the acidity, mellowness and balance of coffee (that is, the combination of taste, aftertaste, acidity and mellowness). When coffee falls to room temperature, begin to assess its sweetness and evenness, as well as its clarity-whether there is a negative impression of coffee from entrance to spit. Add up all the scores and give the total score.
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