The process of roasting coffee beans is what brings out the flavor of the coffee and develops the characteristics for a great taste. The beans are roasted in order to bring a perfect balance of acidity with just the right sweetness. A light bodied, sweet coffee is normally roasted lighter than the full bodied coffee with the chocolaty tastes.
As the coffee beans are in the roasting process, there are chemical and physical changes to the coffee itself. Some changes include the expansion of the beans, loss of moisture, caramelizing and of course a change in the color of the coffee. Once they start losing moisture and expand, they will make a popping sound, which in the coffee industry is known as crack.
Ttwo types of roasting coffee beans