... moisture, anti-rusting of instruments, gauges and equipment. blue/orange silica gel indicator1. Mainly used for absorbing moisture, anti- ... , visually indicating the reletive humidity of the given enviroments.2. When being used with ordinary silica gel or drier, ... , shoes, clothes, foodstuffs, midicines and household electricappliances, etc Orange silica gel indicator blue/orange silica gel indicator