Roasting is a process in which green coffee beans are exposed to temperature of 200-300 Celsius degrees. Success of the process depends on experience of the person operating roasting machine. Some say, that coffee beans should be roasted fast and intensively, to capture precious aromatic combinations, while others claim it is achievable slowly and gradually. However, all agree that the most important is the moment of optimal temperature where process of roasting is stopped. Roast level determines how coffee was roasted.