prov:value
| - , polyvinylidene, polyvinyl chloride, polystyrene, a fluorine resin such as polytetrafluoroethylene and polytrifluoroethylene, and an acrylic resin such as polymethyl methacrylate, polymethyl acrylate. [0133] The pH adjuster may be the weak acid salt and hydroxide of an alkali metal, or the weak acid salt and hydroxide of an alkali earth metal, typical of which are Na2CO3, NaHCO3, Na3PO4, Na2HPO4,
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