Yarn colouring, which happens before the fabric is woven or unwoven, is employed to supply material checks, plaids, woven stripes and different computer graphics. Blue bleached warp yarns, for instance, area unit combined with white filling yarns in denim construction.

Yarn DyeingOne of the foremost normally used yarn colouring ways is package colouring. during this system, yarn is wound on perforated cylinders or packages and placed on vertical spindles in an exceedingly spherical colouring machine.

The dye solution is forced alternately from the surface of the packages inward and from the within out struggling.