Montmorillonite clay desiccant is commonly known as concave-convex sticky earth desiccant. The convex desiccants are processed referring to the desiccant's demands and making the best of the native concave-convex stone clunch. The products have the capacities of adsorption activeness, static reduce moisture and remove unusual smell. They are commonly used in the products and they can't use oil seal, gas seal, for instance, the sealing of the drying air for optical instrument, electronic products, medicine health care, food packing, war industry product and the civil product. The method of application is decided by the materials of packing and sealing, for example, the sealing, the packing cubage, the surface area of packing and the years of sealed. Make sure the dosage according to the different demands. Attention: the desiccant should be put in the right position when adopt the packing of desiccant air seal, ensure that the desiccant can affected all the sealed room, if precious materials, increase the dosage of desiccant, it is benefit of prevent the loss due to condensed water dew. The method of regeneration: to improve the concave-convex earth desiccant's activeness, after some times, it can be used after regeneration. Dry it to the water content of