Lamba wonyamula mankhwala a PET amakhala ndi kulimba mtima komanso kulimba kolimba, ndipo amagwiritsidwa ntchito kwambiri pamakampani opanga ma CD. M'mafakitale ena, zomangira zitsulo zapulasitiki zimagwira ntchito yosasinthika. Poyerekeza ndi zingwe zachitsulo, zomangira zitsulo zapulasitiki zimapereka chitetezo chabwinoko