| http://www.w3.org/ns/prov#value | - As to the present invention, in the case where the water-absorbent resin and the plant powder are mixed together, the optimum amount of such as water, water vapor, or aqueous liquids including water and hydrophilic organic solvents, which are added if necessary, is different according to the type or particle diameters of the water-absorbent resin.
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