Coffee has its own taste only when it is roasted.

Roasting raw coffee beans is called coffee roasting, roasting is the source of coffee flavor, raw beans can not be drunk without roasting. Roasted coffee beans determine 80% of the taste of coffee, the roasting process is very tricky, not roasted, the fire is too strong, then the outer ripe endogenesis, the fire is too weak, then the inner ripe overcooked. Coffee beans are roasted both inside and outside, and controlling the heat is the key point. Good roasting can skillfully show the aroma, sour and bitter taste of raw coffee beans.