Ma coils / ma sheet okonzedwa amatchedwanso kuti utoto / ma shiti okhala ndi utoto, nthawi zambiri amapangidwa ndi kupaka (rolling) magawo pamtunda kapena filimu yogwiritsa organic ndikuphika mumails / ma sheet omaliza. Masanjidwewo ndi makola amitsulo (PPGI) kapena makola achitsulo a galvalume (PPGL), ma aluminium coils (PPAL).

Ma coils / ma sheet okonzedwa ndi zinthu zatsopano zomanga zomwe zikukula mwachangu posachedwa padziko lonse lapansi. Imakhala ndi mphamvu ya mankhwala, kuwirira koyambirira, kuphimba komaliza ndi njira zina pamzere wopitilira. Mfundoyi ndi yunifolomu, yokhazikika komanso yabwino, yabwino kwambiri kuposa kupaka phukusi kapena kupaka burashi kwa zigawo zachitsulo.

Ma waya / ma sheet okonzedwa amakhala ndi zokongoletsera zabwino, mawonekedwe omanga, komanso mawonekedwe abwino a kukana kwa kutu. Kuphatikiza kovunditsa ndi kwabwino ndipo sikusintha kwa nthawi yayitali. Chifukwa chitsulo chokonzedwerachi chimatha kulowetsa nkhuni, ndimagwira bwino ntchito zomangamanga, kupulumutsa mphamvu, kupewa kuwonongeka ndi chiwongola dzanja chabwino.