Used to absorb moist air or oxygen, desiccant packets can contain different type of granules or desiccant powders. Color silica gel granules (blue and orange) change color at different levels of absorption; non-colored (white) version is also available. Once granule is fully contaminated, it changes color completely to indicate it needs to be replaced. Granules can be restored to original shape and size by heating to over 300°C, and packet form factor optimizes absorption area.
This story is related to the following:Packaging Products & EquipmentBagged Desiccants | Desiccant Bags