The one way degassing valve knows that in order to ensure the optimal solubility of the coffee, the boiling water temperature should be lower than boiling point. If the water temperature is too high, the taste of coffee will become bitter, but if it is too low, the taste of coffee will become sour, losing the aroma and flavor of coffee.
The barista's mastery of the coffee machine's performance keeps the water at the optimum temperature so that the coffee's aroma is released without reservation.
Of course, the barista must take the time to figure out the performance of the coffee machine.
One way valve believes that drinking coffee should be like tasting wine, first smell the aroma, and then try a small bite, that you can taste the essence of it.