Siponji ya PVA imakhala ndi madzi amphamvu, omwe amatha kutsimikizira bwino zosowa za mutu wogwira ntchito, kotero kuti collodion mop ndiyo yabwino kwambiri yoyeretsa pansi yosalala monga matayala pansi.Mutu wa PVA ndi gawo lofunikira la mop.Pa mop, siponji ya PVA imayang'anira kuchotsa fumbi, litsiro ndi ntchito zina, ndikulumikizana mwachindunji pansi.Mop uyu wagawidwa m'magulu awiri molingana ndi mitundu: gulu loyamba, kupindika kufinya .Mtundu wachiwiri ndi mtundu wofinya wodzigudubuza.Mtundu wopindika ndi mtundu wopukutira uli ndi zabwino zake.1. Pindani Finyani PVA siponji mop mutu, kakang'ono, zosavuta kusintha, zotchipa.Koma panthawi imodzimodziyo, malo opopera amakhalanso ochepa.2. Voliyumu ya mutu wa siponji ya PVA wodzigudubuza ndi yaikulu.Mtengo uyenera kukhala wokwera mtengo molingana ndi kukula kwa mutu wa thonje la rabara.Si yabwino m'malo theka apangidwe mphira thonje mutu, ndi zambiri zomangira ayenera kuikidwa.Komabe, pokolopa pansi, malo olumikiziranawo amakhala okulirapo, ndipo mopopa amakhala oyeretsa komanso opulumutsa antchito. kuchulukitsa kakhumi kuposa siponji wamba.Kuti zikhale zosavuta, ingoviikani chopopa cha rabara m'madzi ndikuchikoka pang'onopang'ono poyeretsa