Herringbone twill definition features and classification:
Definition of herringbone twill:
When the direction of the continuous twill lines is changed after a certain number of yarns at a convenient position, the warp floats where the weft floats and the weft floats where the warp floats, thus creating an exact opposite design side by side, then this modified twill is called a herringbone twill. https://bdfabric.com/zigzag-twill-definition-features-classification-structure/
Herringbone twill definition features and classification. In herringbone twill, the first yarn to change direction is warp or weft, starting from the opposite position of the previous yarn. After the design is completed, if the design is divided transversely in the exact middle position, then the two designs will be the warp and the other will be the weft. But in this case, the double face twill will not show similar results.
Features of herringbone twill:
1. It is a modified form of a continuous twill.
2. Horizontal herringbone twill is formed by changing the direction of the twill line depending on the warp and weft yarn and vertical herringbone twill is formed by changing the direction of the twill line based on the weft yarn.
3. Horizontal herringbone twill has double the number of warp yarns and doubles the number of weft yarns in vertical twill.
4. The simplest herringbone twill has a repeat of 8 x 4 or 4 x 8.
5. Drafting is usually a broken draft, but during vertical, it is a straight draft.
Classification:
Herringbone twill is divided into two types depending on the direction of the twill lines i.e.
(a) Horizontal herringbone twill.
(b) Vertical herringbone twill.
(a) Horizontal herringbone twill:
A twill that is formed horizontally by changing the direction of the twill lines on the herringbone principle of twill consisting of double the number of threads warps in the repeat is called a horizontal herringbone twill.
(b) Vertical herringbone twill:
The twill design is created by continuously changing the direction of the twill lines on the herringbone principle with the yarns weft twice in the repeat, called vertical herringbone design.
