SKEWING OF DENIM FABRIC
Skewing is a common fabric defect in woven fabrications where weft or filling yarns are distorted means a pattern on one side of the fabric is ahead or behind the pattern on the opposite side. This is usually caused in fabric weaving or processing when both fabric edge will be pushed by a roller with different force.
Skewing is a similar condition in which filling yarns are angularly displaced from a line perpendicular to the edge or side of the fabric. It is a condition resulting when filling yarns or knitted courses are angularly displaced from a line perpendicular to the edge or side of the fabric due to uneven distribution of tension.
Lighter the fabric in weight (gsm) more chances of skewing and heavier the fabric in weight (gsm) fewer chances of skewing will be there. Finer the yarn count (Indirect system) more chances of skewing and coarser the yarn count then fewer chances of skewing will be there.
How do you calculate fabric skew?
Skew (bias) is defined as the distance measure parallel to and along a selvedge between the point at which a filling or course yarn, stripe, or dominant line meets the other selvedge. If the fabric skews after five wash and dry cycles, the square can be measured for per cent skew. Skew%= Dip of the Skew (Maximum deviation from the perpendicular line) × 100 Width of the fabric
Measurement procedure of Skewness in the Fabric
- Lay the fabric, without tension, on a horizontal surface at least three yards long.
- Place a straight edge across the fabric perpendicular to the selvedges at a point where a filling of course yarn,…
- Measure the distance parallel to and along a selvedge between the point at which the yarn, stripe, or dominant line…
- Repeat this procedure at least three places along the length of the fabric and report the average maximum bias.