| prov:value
| - Examples of the binder to be used in the embodiment (1) may include water-soluble polymers such as polyvinyl alcohol, starch, oxidized starch, cationized starch, casein, carboxymethyl cellulose, gelatin, hydroxyethyl cellulose, etc. and water-dispersed type polymers such as SBR latex, MBR latex, vinyl acetate emulsion, acrylic type emulsion, etc., which may be used either singly or as a mixture of
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