3, Color Observation Stone Mill flour contains a lot of carotene and dietary fiber, so stone mill flour is natural white, and with a yellowish. Due to the selection of high-speed and high-pressure flour, the grinding process of modern steel flour is too intense, resulting in the loss of a large number of nutrients in the flour, the starch chain molecular structure of the flour is destroyed, and the stability of the dough drops at every moment, it is difficult to form a stable state with the dough, so it is necessary to add stabilizer. In addition, in order to cater for everyone to eat the whiter the better the wrong diet habits, but also added whitening agents, gluten-strengthening agents (benzoyl peroxide and potassium bromate industrial raw materials) and other additives. So the flour is white.