The white layer of dried bamboo shoots is not moldy. According to the query related public information shows: dried bamboo shoots above a layer of white material is a normal phenomenon, not caused by mold, which is bamboo shoots in the process of natural tanning the formation of an alkaline substance, its form and color looks like a layer of white frost, but which does not contain toxic substances, you can rest assured that you can use, as long as the use of these white substances can be washed before use. Dried bamboo shoots are made from bamboo shoots, which are refined through a number of processes such as shelling, cutting roots and trimming, high-temperature steaming, clear water immersion and bleaching, manual slicing, pressing and molding treatment, natural drying, drying, shaping and packaging.