PVA, lossis polyvinyl alcohol, yog ib qho polymer uas tau yog qhov chaw ntawm kev xav hauv lub sijhawm dhau los vim nws cov khoom biocentric. Yog hydrophilic thiab biodegradable, PVA yog siv hauv ntau qhov chaw, los ntawm cov khoom ntim mus rau cov ntaub ntawv mus rau kev tsim kho. Nws yog ib qho khoom plig rau ntau tus neeg tsim khoom vim nws dissolves hauv dej thiab tsis tso cov khoom phem. Cov neeg tsim khoom suav nrog PVA hauv lawv cov khoom kab ntau lawm tsis tsuas yog txhim kho lawv cov khoom portfolio tab sis tseem tsim lawv tus kheej ua ib qho uas muaj kev saib xyuas ib puag ncig thiab ua lawv txoj haujlwm hauv kev koom nrog qhov kev tshawb fawb kom txo cov pa phem thiab kev ntseeg siab dhau ntawm plastics los ntawm kev nrhiav cov kev xaiv tsim nyog.