Zosakhala zowopsa, zosagwirizana ndi madzi ndi filimu yopumira yaying'ono-porous, chitetezo cha tinthu cholimba ndikukana mankhwala ambiri owala ndi ma acid.
Ndi hood, zipped kutsogolo, opanda matumba ndi zotanuka m'manja, akakolo ndi m'chiuno.
Mtundu 5/6