To buy vermicelli, we must first observe its color and thickness. Generally speaking, high-quality vermicelli will be darker in color and even in thickness, and occasionally there will be some small white pimples on vermicelli. This is because sweet potatoes will always be ground not too fine when they are ground, leaving some small particles, so some small white pimples will appear on the vermicelli when they are discharged. But the inferior vermicelli will be lighter in color, transparent and shiny, because this vermicelli adds a lot of chemical components. Therefore, when choosing vermicelli, we must carefully observe the color and thickness.

The second measure: fans fold in half.

High-quality vermicelli is mainly sweet potato starch, so it will break when it is slightly folded by hand after drying, and it will make a crisp sound, and this kind of vermicelli is not easy to regain moisture. You can buy it with confidence when you encounter this kind of vermicelli. And if those vermicelli are particularly difficult to break, it means that there are a lot of edible gum in vermicelli, which not only tastes bad, but also causes some harm to human health if eaten too much.

The third measure: use fire.

This trick suggests that you take a lighter with you when you are ready to buy vermicelli again. When buying vermicelli, we can take a small one and burn it with a lighter. High-quality vermicelli will swell in case of fire, and there will be no unpleasant smell and cracking sound during combustion. White ash usually appears after combustion. The inferior vermicelli is easy to smell an unpleasant smell when burned, and there are some crackling sounds. The ashes after burning are black.

The fourth measure: look at the color of vermicelli.

The color of pure sweet potato vermicelli generally looks pale yellow and opaque, and it looks dull with a little blackness. The vermicelli on the market is not as real as pure sweet potato vermicelli. The vermicelli on the market is beautiful in color and high in gloss, and looks very good. In fact, this is an illusion created by merchants, just like flour is processed black, not the white appearance sold in supermarkets.