Stone-ground flour, that is, flour without any additives processed by a traditional stone mill. The rotation speed is about 20 revolutions per minute. So the price is particularly expensive, about five to eight dollars a catty.

Benefits of stone milling

Low-speed grinding, low-temperature processing, will not destroy the nutrients in the wheat, so the stone milled flour maximizes the retention of protein, gluten, carotene, carbohydrates, calcium, phosphorus, iron, vitamin B1, B2, and other various nutrients in wheat.

Its low-speed grinding characteristics in turn maintains the molecular structure of the flour without any additives, and when cooking the noodles, the color of the noodle soup of stone-ground flour is light yellow.

Stone-ground flour retains the original flavor of wheat.

The traditional stone mill is made from the upper and lower two after a thousand hammered, brazed and axe carved round stone, both are with a certain thickness of the large stone carved by hand into a flat cylindrical, in the two discs chiseled out a diagonal pattern, called the grinding teeth.

Stone mill grinding teeth production is a highly specialized and complex technology.

The top of the mill disc also chiseled on the hole, and the lower disk bite, fixed on a stand, and the lower fan in the middle of a short vertical axis, made of iron, the upper fan in the middle of a corresponding empty sleeve, the two fans together, the lower fan is fixed, so that the upper fan can be reversed around the axis rotation. At the same time, the contact surface of the two fans have an empty chamber, called "grinding chamber". The periphery of the chamber also has a rolling grinding teeth, the upper mill also has a grinding eye, grinding things, the grain through the grinding eye into the grinding chamber, evenly distributed around, was ground into powder, from the cracks to the grinding disk. The upper fan of the stone mill is rotating, and its grinding teeth and the grinding teeth of the lower fan are biting each other as well as wrong each other, forming a very small elevation movement, so there is a transient gap between the upper and lower fans, so that the processed grains are continuously entering the grinding teeth through the aperture of the upper fan. Low-speed grinding, low-temperature processing, nutrients are not damaged, but the stone mill has the disadvantage of too high sand content.