The use of filter paper helps remove some of this biting taste. However it is far better not to scorch or burn the beans. In order to avoid this scorching and non-uniform roasting of coffee beans, engineer Mike Sivetz developed a fluid bed "once-thru-air" coffee bean roasting machine that produces a clean, "tar-free", non-biting, smooth tasting beverage. It has been a wild success since 1975!
Further, the Sivetz fluid bed roaster with its thermal bean sensor is the only roaster that can measure true bean temperature because the probe is in a stationary box containing the fluid bed of beans. This accuracy cannot be directly achieved by rotary cylinder machines due to the pure mechanical difficulty of probing a moving mass. You are truly receiving the best possible product available in the market today.*