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Major component of OUKPAK is CaO. It absorbs water via chemical reactions. The amount of water absorbed is not related to environmental humidity and the moisture absorbed will not return during evaporation .
Packaging material is composed of layers of paper, cloth and PE. Compared to products of the same type, the thickness of the layers are increased by 20% on the basis of specific requirements of Desiccant Committee in order to increase safety and intensity .