Yarn Dyeing

There are many forms of yarn dyeing. Common forms are -at package form & at honks form. Cotton yarns are mostly dyed at package form, and acrylic or wool yarn are dyed at hank form.


The common dyeing process of cotton yarn with reactive dyes at package form is given below in short- firstly the raw yarn is winded on spring tube to achieve package suitable for dye penetration.Then, these softened packages are loaded on a dyeing carrier's spindle one on other. Then, the packages are pressed up to a desired height to achieve suitable density of pkg. then, the carrier is loaded on dyeing machine and yarn is dyed. after dyeing, the packages are unloaded from the carrier in to a trolley. then, all the packages are hydro extracted to remove maximum amount of water. then, all the packages are dried to achieve the final dyed package. at last the dyed yarn packages are packed and delivered.


Both dyes and pigments appear to be colored because they absorb some wavelengths of light preferentially. In contrast with a dye, a pigment generally is insoluble, and has no affinity for the substrate. Some dyes can be precipitated with an inert salt to produce a lake pigment.


Archaeological evidence shows that, particularly in India and the Middle East, dyeing has been carried out for over 5000 years. The dyes were obtained from animal, vegetable or mineral origin, with no or very little processing. By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale.

Color is the most important attribute to consumers . The colors in fabrics are infinite. They can be solids, multi-colored stripes, or other pattern effects such as floral and geometries. Dyeing of the material can be done at any stage of making the fiber, yarn, or fabric. The desired effect to be achieved will usually dictate the dyeing method.


For example, a multi-colored floral pattern requires the individual yarns to be pre-colored to as many different shades as there are in the desired pattern. The various colored yarns are then constructed into the floral pattern fabric. 

 By contrast a solid color can be achieved by constructing the fabric first and then dyeing the fabric. Another way to achieve a solid color or multi-color effect would be to use pre-dyed fiber, produce the colored yarn, and then construct the fabric. This assures consistently uniform color. Printing is localized coloration that also achieves multi-colored effects.