First of all, the color of ordinary noodles is yellow and white, and the noodles with formaldehyde are particularly white.

Secondly, ordinary noodles are easy to cook, and they are soft and fragrant when made of flour, and they break when pulled. Formaldehyde noodles are not easy to cook, and noodles are tough and not easy to break. 4. How to tell whether formaldehyde is added to vermicelli 1? Observe the color of vermicelli: For example, vermicelli we usually see in the market belongs to sweet potato powder or potato powder. No matter what kind of vermicelli is of high quality, it will show a white and transparent texture, and it is very shiny when viewed in the sun.

But if it is a fake vermicelli containing a lot of harmful substances, the color will be gray or dark brown and dull. 2. Observe the toughness of vermicelli: Like high-quality sweet potato powder, it is almost the same in thickness and width, and it will not break. It is not so easy to break when it is broken, and it is full of toughness. Moreover, formaldehyde noodles will have a lot of adhesion together, and they are inelastic and easy to break. 3. Smell the smell of vermicelli: high-quality vermicelli will not have other strange smells, while vermicelli containing harmful substances will have a sour or pungent smell. If we cook it in a pot, it may taste bitter, so don't buy such vermicelli! .