Washing is considered as the final process of garments finishing. Acid washing is one kind of finishingtreatment used for making sewn garments aesthetic, fashionable, soft, comfortable andalso adding value to the final garments. This paper investigates the effect of the acid washing (withthermocol balls and potassium permanganate) on different physical properties of three knittedgarments (Single Jersey 100% Cotton T-shirt, Single Jersey 95% Cotton 5% Spandex T-Shirt and 1× 1 Rib100% Cotton T-Shirt). Typical washing procedures and techniques were followed and thenphysical properties were analyzed under standard condition. It is observed that fabric weight, CPI,WPI, spirality and shrinkage increase while bursting strength, stitch length absorbency decreaseafter washing treatment. pH of all the samples is under controlled and lies between 7 to 8. There isno change in pilling, colorfastness to wash, water and dry rubbing while a little bit decrease in wetrubbing.
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