According to the quality, a kilo of mung beans can range from150g to 200g of starch. A catty of mung bean starch can produce about a catty of dried mung bean powder skin. The vermicelli made of pure mung bean starch is slightly egg-blue translucent or mixed with milky white. If the vermicelli is green, it is made of pigment or dye. If the color is dark and the transparency is low, it means that there are impurities or other starch, which is not pure mung bean powder skin.