Boron ash can't be put in cold rice noodles, which is really harmful to customers. Cold noodle is a kind of pure starch food, which is made of starch in wheat flour. If you look at flour from the perspective of cold noodles, flour is composed of starch and gluten, so to make cold noodles, you must first separate starch from gluten. There are many procedures for making cold noodles, including mixing, washing, sinking, mixing and making. Each process has its own requirements. If one process is not done well, it will definitely affect the final quality of the whole cold rice noodles. Therefore, the production of cold rice noodles is a systematic project, which is interrelated, interlocking and mutually restricted. It is very important to use the right method to make cold noodles well. Any form of addition is only an auxiliary role in cold noodle making. It's useless to add anything without the right way. And as a kind of food, the first thing to pay attention to is safety. Safety comes first at all times, and it is the top priority of our whole work. If you leave the security, everything will be impossible. How to make cold noodles, how to do it well, there are videos of making handmade cold noodles in my mouth space, with detailed descriptions of the cost, profit and business model of cold noodles, as well as the structure of the cold noodle stove and the physical pictures of the cold noodle making tools.