Classification of twill weave: S twill, Z twill, Warp way twill, Weft way twill, Simple twill, expanded twill, Multiple Twill. Derivarives of twill: Zig-zag, Harringbone, Diamond,Diaper, Broken, Rearranged,Shaded, Steped, Elongated, Combined and Curved twill.
A twill weave is characteristics by diagonal ribs (twill lines) on the face of the fabric. These twill lines are produce by letting all warp ends interlace in the same way but displaing the interlaceing points of each end by one pick relative to that of the previous end while the plain weave can only be woven in one form, there exit several options with regrad to twills.
The various drafts are classified as follows:Straight draft,Skip draft,Satin draft,Pointed draft,Broken draft,Divided draft,Grouped draft,Combined draft,Curved draft.