Yoyengedwa kuchokera ku mwala wachilengedwe, ili ndi mawonekedwe okongola, achikale komanso okongola okongoletsa;
Ili ndikuipitsa mpweya kochepa kwambiri, kukana dzimbiri, kukana mvula ya asidi, mtundu watsopano komanso kusakhala ndi kuipitsidwa;
Mitundu yosiyanasiyana ya miyala yachilengedwe, yoperekamitundu yosiyanasiyana yofananirandi mtundu wokhalitsa;
Yokhala ndi kukana kotsutsana ndi chimfine ndi alkali komanso yomatira bwino kwambiri, yoyenera kugwiritsidwa ntchitomasauzande ambiri a substratesKuwala koletsa ultraviolet, kukana kuzizira, kukana nyengo, komanso kukana dzimbiri la carbonate. Chobiriwira, chosamalira chilengedwe, chotetezeka komanso chopanda poizoni.
Pamwamba pa chinthu chomwe chikupakidwapo payenera kukhala paukhondo, paukhondo komanso pouma. Chinyezi cha khoma chiyenera kukhala chochepera 15% ndipo pH iyenera kukhala yochepera 10.
Chogulitsachi chikhoza kusungidwa pamalo opumira mpweya, ouma, ozizira komanso otsekedwa kwa miyezi pafupifupi 12.