What are the defects in knit fabric?

Raw Material (yarn) related defects

Barriness: Horizontal Stripes or streaks of uniform or uneven width, visible in the fabric

Imperfections: Imperfections are the occurrence of knots, slubs, thick or thin yarns, and neps in the fabric

Contaminations: When foreign matter like dead or dyed fibres or husk, etc appear in the fabric

Snarling: Snarls are big twisted yarn loops on the fabric surface

Spirality: Spirality is when after washing garment gets twisted, and the seams of the garment get displaced from the sides of front and back of the garment

Knitting elements related defects

Needle and Sinker Lines: Prominent or feeble vertical lines across the fabric.

Drop Stitches (or holes): Appearance of small or big random holes in the fabric

Knitting machine settings related defects

Yarn streaks: Thin horizontal lines that appear at irregularly spaced intervals and are of various sizes

Fabric Press off: Appearance of holes in the fabric due to an interruption in a loop formation

Broken Ends: a bunch of ends knitted at a point

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Image sources:http://www.slideshare.net/OliyadEbba/faults-remediespreventive-measures-in-knitted-fabric-dyeinghttp://www.slideshare.net/88azmir/fault-of-knitted-fabricshttp://www.slideshare.net/sheshir/an-investigation-on-the-inspection-of-grey-finished-knit-fabric-in-wet-processingehttp://textilecollection.blogspot.in/https://shosh101.files.wordpress.com/