Noodles are made from flour, which is ground wheat.

We often say "flour" refers to wheat flour, that is, wheat milled flour, "high-gluten wheat flour" and other names refers to what we usually call flour.

Wheat flour is divided into special flours (such as bread flour, dumpling flour, cookie flour, etc.), general-purpose flours (such as standard flour, enriched flour), nutritionally enhanced flours (such as calcium-enriched flour, iron-enriched flour, "7 +1" nutritionally enhanced flours, etc.) according to the performance and use; according to the accuracy of the special first-class flour, special flour, standard flour, ordinary flour, etc.; according to the precision of the first class flour, special flour, standard flour, ordinary flour, etc.; according to the flour, the flour is divided into a special flour, a special flour, an ordinary flour, and so on. flour, standard flour, common flour, etc.; according to the gluten strength is divided into high-gluten flour, medium-gluten flour and low-gluten flour.

Expanded

The grade of flour is also directly related to the content of minerals (ash) in the husk and germ of wheat grains, the higher the content of minerals, the lower the grade of flour; on the contrary, the lower the content, the higher the grade of flour. If the pursuit of bread has the unique flavor of flour, low-grade flour is more appropriate than high-grade flour.

For example, healthy whole-wheat bread is made from whole-wheat flour milled from wheat that contains bran. In the case of flour in general, the amount of minerals in it will not have much effect on the nature of the bread it makes. However, if the mineral content is high, the color of the flour is slightly grey, and the color of the bread is naturally dark.

Reference? Baidu Encyclopedia - Flour