The development and research of cobalt-free color-changing silica gel are based on blue color-changing silica gel. It is an orange color-changing silica gel produced by impregnating fine-pore silica gel with an inorganic salt mixture solution. Utilizing a new composite dye, it fundamentally eliminates environmental pollution caused by dyes and color-changing agents. With its unique technological conditions and excellent adsorption performance, the product has become a new generation of environmentally friendly product.

This product is mainly used for drying and indicating the saturation level of desiccants, as well as for sealed packaging and the relative humidity of the medium in the internal spaces of precision instruments and meters. It is also used for moisture prevention in general packaging and instrument protection. It can be used alone as a desiccant or in combination with fine-pore silica gel. For moisture protection of instruments and meters, it can be used independently as a desiccant or together with fine-pore silica gel.