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AHA pob.tun":ng35zzwv]I ordered it. Base PVA 217 and follow the instructions on the website, that is, mix the water, but when I mix PVA into the water like PVA, it will not dissolve completely. So I would like to ask for more information about mixing. whether water should be used at room temperatur...

I ordered Base PVA 217 and followed the instructions on the website, that is, mix the water, but when I mix the PVA into the water like PVA, it doesn't dissolve completely. So I would like to ask for more information about mixing. whether water should be used at room temperature or hot/boiling water...