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Why does dark polyester fabric develop pale or greyish patches after rubbing? Learn how abrasion, filament damage, surface roughening and light scattering cause frosting. Discover how to distinguish frosting from dye fading and pilling, evaluate abrasion resistance and select durable polyester knitted fabrics.

Why do some polyester knitted fabrics develop continuous vertical streaks even when their GSM, colour and width are correct? Needle lines and sinker lines are technical knitting defects often linked to damaged machine components and irregular loop formation. Learn their causes, differences, inspection methods and prevention techniques.