The Treasure of the World-- "Queen of beans"-- Kona
Hawaiian Kona coffee is indeed a treasure in the world and is not easy to find.

The best Kona coffee is divided into three grades: ExtraFancy, Fancy and NumberOne. This third-class coffee is produced on manors and under natural conditions. But most of the coffee on the market that calls itself "Kona" contains less than 5% of the real Hawaiian Kona coffee.
Another good Hawaiian coffee can be found in the United States-Hawaii Kaj Farm Coffee.
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On the Concepts of some Common words in extraction
Blonding: describes the conversion of the liquid from dark brown with tiger stripes to uniform light yellow. This usually occurs in the last 1amp 3 stage, indicating that the extraction operation can be ended. The over-yellowing part of espresso has a light taste and almost no aroma. If it lasts too long, it will dilute the mellowness and is no longer a pleasant taste. Channel effect (ch)
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Selection of coffee grinder
The grinder is more important than the coffee machine, and players recommend a sawtooth grinder because it can grind uniform coffee powder quickly and steadily. When you choose to buy a grinder, you should pay attention to its power, usually between 70 watts and 150 watts, the higher the better, the higher the power, the faster the grinding speed, and the shorter time the coffee powder stays in the sawtooth, so it can grind coffee with low temperature.
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