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The product has the same adsorption and moisture resistance functions as narrow pore silica gel, and is characterized by color change with the increase of humidity in the moisture absorption process. It can not only indicate the ambient humidity, but also directly show whether the desiccant needs to be changed. This product can be used as desiccant independently, or used with narrow pore silica gel.
Color-changing silica gel indicates changes in external air humidity or changes in desiccant adsorption capacity through changes in its own color, and acts as an indicator. It is divided into two types: cobalt chloride-containing and cobalt chloride-free. Because cobalt chloride is at risk of causing cancer, people usually prefer to use silica gel that does not contain cobalt chloride. The most common indicators of cobalt chloride-free silicone are blue to pink, orange to green, ruby red to light yellow, etc
The indication silica gel after failure can be recycled. Put the color-changing silica gel in a drying equipment with a temperature of 100-120 degrees, and wait for the color of the silica gel to change back to its original color, and you can continue to use it. It should be noted that the regeneration temperature should not exceed 120 degrees, otherwise it will destroy the activity of silica. In addition, the adsorption capacity of silica gel may decrease by 3-5 % every time.
