| http://www.w3.org/ns/prov#value | - When such an additive is desired to be added, a compound such as a chloride or an oxide of the desired additive may bedissolved in the additive solvent to manufacture an additive solution, and this may be used in the impregnating process.Further, in the above embodiment, although methanol is used as the additive solvent, the solvent is not particularly limited as long as the solvent is able to dis
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