Silica gel desiccant can be divided by colors: white, blue, and orange. White silica gel desiccant does not change color after moisture absorption, while blue and orange silica gel desiccant change color after moisture absorption. Blue silica gel desiccant usually turns to pink, and orange silica gel desiccant usually turns to green or transparent. If according to the shape, silica gel desiccant can be divided into spherical and granular shapes. If according to the different moisture content, there are usually two types: 2% moisture and 5% moisture.