| http://www.w3.org/ns/prov#value | - Herein, the ???water-soluble polymer??? means a polymer which dissolves, in 100 g water at 20??? C., in an amount of preferably 0.05 g or more, more preferably 0.1 g or more, further preferably 0.5 g or more, and particularly preferably 1 g or more.
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