Poyerekeza nthawi ya utumiki wamalamba ochotsera ndoweZopangidwa ndi zinthu zosiyanasiyana, tingaganizire za makhalidwe a zinthuzo, kukana kukanda, kukana dzimbiri ndi zina. Malinga ndi zomwe zilipo pagulu, izi ndi kusanthula mwachidule kwa nthawi yogwiritsira ntchito zinthu zosiyanasiyana:

Lamba wa PP (polypropylene):
Ubwino:Lamba wochotsera ndowe wa PPZimadziwika ndi mphamvu zake zambiri, kukana dzimbiri, kukana kugundana, komanso zimakhala zosavuta kuyeretsa ndipo zimakhala ndi moyo wautali. Nsaluyi ndi yosavuta kugwiritsa ntchito ndipo nthawi yomweyo, imatha kuzindikira ukhondo ndi kuyera kwa malo oberekera.
Moyo wautumiki: malinga ndi kufotokozera kwa opanga ena, moyo wautumiki wa lamba wa ndowe wa nkhuku wa PP ndi pafupifupi zaka 5-7.
2, PE (polyethylene) manyowa onyamulira lamba:
Ubwino: mtengo wa zinthu za PE ndi wapakatikati ndipo nthawi yake yogwirira ntchito ndi yayitali.
Zoyipa: Zipangizozi zimatha kutambasuka ndipo zimatha kutalikitsa kapena kusokonekera akamagwiritsa ntchito, zomwe zingapangitse alimi kufunikira kusintha lamba ndi watsopano pasadakhale.
Nthawi ya Moyo: Ngakhale kuti ziwerengero zinazake sizinatchulidwe, zimaonedwa kuti zimakhala ndi moyo wautali.
3, PVC (polyvinyl chloride) yotsukira manyowa lamba wonyamulira:
Ubwino: PVC ndi yotsika mtengo ndipo mtengo wake ndi wotsika.
Zoyipa: Nthawi yochepa yogwirira ntchito, yomwe ingakhale kuyambira miyezi ingapo mpaka zaka ziwiri. Makamaka ngati sichinayikidwe bwino, nthawi zambiri chimachepa n’kukhala mpira wosagwiritsidwa ntchito.
Moyo wautumiki: waufupi, nthawi yeniyeni imadalira mtundu wa kukhazikitsa ndi malo ogwiritsira ntchito.