Desiccants can be divided roughly into solid type and liquid type.Seal-type desiccants with adhesive are the most common solid type used today,and they are supplied on reels.Desiccant of this type are peeled from the reel by a suction head and affixed onto a substrate.
On the other hand, liquid-type desiccants are applied by a dispenser, and then heat-treatedLiquid-type desiccants thus require an additional heating process conducted in a vacuum oven or vacuum hot plate.