变色硅胶具有细孔硅胶的吸附防潮作用，其特点是吸湿过程中，能随吸湿量的增加变成浅蓝色，最后变成浅红色或浅粉色。既可指示环境的湿度也可直观显示是否需要更换新的干燥剂。

Blue silica gel has the adsorption and moisture-proof effect of narrow pore silica gel, It is characterized by the moisture absorption process, it can become Light blue with the increase of moisture absorption, and finally become light red or light pink. It can indicate the humidity of the environment and also visually show whether a new desiccant needs to be replaced.

变色硅胶广泛用于呼吸器、变压器、电柜、精密仪器、皮革、服装、家用电器的包装防潮，可单独做干燥剂使用，也可以与细孔硅胶配合使用。

Blue silica gel is widely used in respirators, transformers, electrical cabinets, precision instruments, leather, clothing, household appliances packaging moisture-proof, can be used as a desiccant alone, can also be used with fine silica gel.