| http://www.w3.org/ns/prov#value | - In the present invention, the polymer matrix 107 may include: a water-soluble polymer such as polyvinyl alcohol, gelatin or polyethylene oxide; and a polymer obtained through photopolymerization or thermopolymerization of a monomer or a prepolymer of acrylate-type, methacrylate-type, epoxy-type, etc.
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