Mukafuna kugwiritsa ntchito lamba la polyester PET poyendera mtunda wautali, pali zitatu zomwe zimawonekera: zomangira zolemetsa zamtundu wa PET zokhala ndi chitetezo chokwanira, zomangira zosagwirizana ndi UV zonyamula katundu zomwe zidzakhale kunja, ndi zingwe zolimba kwambiri zomwe zimagwira ntchito ndi makina odziwikiratu mwachangu. Wh