Various Types of Defects in Knitted Fabrics
Bands and Streaks
There are different kinds of bands and streaks that may
occur in knitting. Some of the popular defects are as follows:
v Barrie Effect: A Barrie effect has the appearance
of a stripe with shaded edges. It is horizontal in weft knits and vertical in
warp knits. The barrie effect is caused by various factors like:
uniformity in yarn size, color or luster.
Mush tension on
the yarns during knitting one section of the fabric.
or other finishing defects.
v Bowing: A line or a design may curve across
the fabric. This bowing is the distortion caused by faulty take-up mechanism on
the knitting machine.
v Streak or
Stop Mark: A
straight horizontal streak or stop mark in the knitted fabric is due to the
difference in tension in the yarns caused by the machine being stopped and then
v Skewing: Skewing effect is seen as a line or
design running at a slight angle across the cloth.
v Needle Lines: Needle lines or vertical lines are due to a wale that is
either tighter or looser than the adjacent ones. This is caused by needle
movement due to a tight fit in its slot or a defective sinker.
There are various kinds of stitch defects like:
v Boardy: The knitted fabric becomes boardy
(a stiff or harsh hand) when the stitches have been knit very tightly.
v Cockled or
puckered: If the
knitted fabric is cockled or puckered, it is due to uneven stitches or uneven
Stitch: This is an
un knitted stitch caused either by the yarn carrier not having been set properly or the stitch having been knitted too loosely.
v Run or
ladder: A run or
ladder indicates a row of dropped stitches in the wale.
v Hole: A large hole or a press off is the result of a broken yarn at a specific needle feed so that knitting cannot
v Tucking: This is the result of an
unintentional tucking in the knitted fabric. This is also called the bird's eye
v Float: This is caused by a miss stitch
which is the result of failure of one or more needles to have been raised to
catch the yarn.