Zinthu zogulitsa:
Mbale yaikulu imapangidwa ndi bolodi la PP (polypropylene) lokhala ndi makulidwe a 8mm, lokhala ndi zinthu zolimba
kukana asidi ndi alkali, ndipo cholumikiziracho chimapangidwa ndi cholumikizira chaukadaulo chopanda msoko chokhala ndi
Ndodo yowotcherera ya mtundu womwewo, kukana asidi mwamphamvu, kukana kugunda, kusakhala ndi dzimbiri, kusakhala ndi dzimbiri.