What is Desiccant and what does it do?

Desiccant refers to the substance that can remove the moisture in the wet substance. It is often divided into two categories: chemical desiccants, such as calcium sulfate and calcium chloride, which combine with water to form hydrates for drying; physical desiccants, such as silica gel and active Alumina, etc., are dried by physically adsorbing water.
The control of moisture is closely related to the yield of the product. As far as food is concerned, under proper temperature and humidity, bacteria and molds in food will multiply at an alarming rate, causing food to spoil, causing moisture and discoloration. Electronic products can also cause metal oxidation due to high humidity, resulting in defective products. The use of desiccant is to avoid the occurrence of defective products caused by excess water.