Straight flour is considered a good flour to use for bread making. It is 100 percent extraction flour. The extraction rate is the amount of flour obtained from wheat after milling, when the bran and germ are removed, leaving the endosperm, which contains most of the protein and carbohydrates. For example, based on 100 pounds of wheat, approximately 72 pounds of flour remains after extraction; the other 28 pounds is used for feed. The entire 72 pounds or 100 percent, of the remaining flour is straight flour. Straight flour is used to make patent, clear, and low-grade flours.