Currently on the market to sell sweet potato vermicelli is mainly made of three processes, respectively, the traditional scoop type, extrusion type, coated cutting type, in the three processes, the traditional scoop type, but also on the traditional handmade processing methods, this way the current market share of the largest, we are common is this way, this kind of vermicelli taste is good, but this way of processing vermicelli has a disadvantage, is to be sure to add Alum or alum substitutes, otherwise you can not produce vermicelli to the first two years before the standard revision, it can be said that all the traditional handmade vermicelli are aluminum exceeds the standard. At the same time by the high price of sweet potato starch, the current price of this kind of vermicelli in circulation in the market is relatively low, generally below 5 yuan, while the authentic sweet potato starch on the 4 yuan a catty, so in addition to the addition of alum, most of the other starch, it is recommended to buy the so-called artisanal vermicelli to be cautious.

The second is extruded, this kind of vermicelli can not add, but the vermicelli taste is not good, the market capacity is small, this kind of vermicelli real sweet potato flour is easy to identify, is the surface is not smooth, there is a string of pearl-like shape, so also known as the pearl powder, but some in order to improve the texture of the vermicelli, but also to add some things.

The third is coated cut type, this vermicelli machine also do not need to add, especially with automated line production of straight stripes of powder, add other starch instead of easy, so generally more pure, this powder is also easy to identify, it is square, there are two sides with cuts.