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,.
 
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.