| http://www.w3.org/ns/prov#value | - However, better results are obtained when the refreshing agent is carried on a support in the form of a porous material, for example, active carbon, alumina, silica, silica-alumina, talc, Hormite groups such as attapulgite and sepiolite, diatomaceous earth, woven fabric, non-woven fabric, and silicone sponge.
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