Appearance:
The appearance of blue color-changing silica gel is blue or light blue glass-like particles, which can be divided into spherical and blocky types according to the shape of the particles.
Color change: After absorbing moisture, the color of silica gel will gradually change from blue to purple and finally to light red. This color change not only indicates the humidity of the environment, but also intuitively shows whether the silica gel still has a moisture-proof effect.
Main ingredients: The main ingredients of blue color-changing silica gel are silicon dioxide and cobalt chloride. Among them, cobalt chloride is used as an indicator to display different colors through changes in the amount of its crystal water.
Application:
Moisture absorption and rust prevention: Blue color-changing silica gel is mainly used for moisture absorption and rust prevention of instruments, meters, equipment, etc. under closed conditions.
Indication function: It can be used in conjunction with ordinary silica gel desiccant to indicate the degree of moisture absorption of the desiccant and judge the relative humidity of the environment through color changes.
Packaging moisture-proof: As a silica gel desiccant for packaging, blue color-changing silica gel is widely used in moisture-proof packaging for precision instruments, leather, clothing, food, medicines, and household appliances.
Technical Specification:
Item | parameters | ||||
Blue Silica Gel | |||||
Blue Silica Gel with Cobalt | Blue Silica Gel without Cobalt | ||||
Ⅰ | Ⅱ | Ⅲ | |||
Adsorption Capacity(25℃)% | RH=20% | 8.5 | 8.0 | 8.5 | 9.0 |
RH=35% | 14.0 | 13.0 | 14.0 | 15.0 | |
RH=50% | 22.0 | 20.0 | 22.0 | 23.0 | |
Qualified Ratio of Particle,% ≧ | 95 | 95 | 95 | 95 | |
Qualified Ratio of Spherical Particle,% ≧ | 90 | 90 | 90 | 90 | |
Loss on drying, % ≦ | 2.0 | 2.0 | 2.0 | 2.0 | |
Color Changing | RH=20% | Blue or Light Blue | Blue | Blue | blue or deep blue |
RH=35% | Purple of Purple Red | Light Blue | Blue Purple | Blue Purple | |
RH=50% | Light Pink and Pink | Purple Red | Purple Red | Purple Red | |