Colored fabrics are produced by several methods, the most common industrial methods are the following:

1. Pre-colored yarns are used in weaving or knitting process. The yarns are colored by dyes, either through a dyeing process or masterbatches that is by the spinning process.

2. Dyeing the fabric using a suitable dye. There are several textile dye categories which each category is suitable for a specific fiber. The main categories are: Acidic, Basic, Disperse, Vat, Reactive, Direct, and Sulphur.

3. Printing the fabric using a suitable dye or pigment.

Dyes are a molecule which have a specific color that is stable under a wide range of conditions. These molecules can attach to fibers through a physical or chemical bond. The bond between the dye and the fabric should remain intact through the lifetime of the textile good. Dyes have to be soluble in water during at least one stage of the dyeing process. Dyes are used in at least one of the following dyeing methods:

1. masterbatch production, which later is used in fiber spinning in order to fabricate colored yarns.

2. Yarn dyeing

3. Fabric dyeing

4. Printing

Wovers GmbH provides an extensive variety of premium quality dyestuff, it ranges from Disperse and Reactive categories along a limited number of Sulphuric, Vat and Acidic dyes.

Disperse Dyes

Disperse dyes are a category of textile dyes which are suitable for hydrophobic or low-hydrophilic fibers such as Nylons and Polyester fibers. The main use of Disperse dyes are in spinning, dyeing, or printing of polyester goods. Disperse dyes have a very low solubility in water and thus dyeing with these types of dyes is only possible by using carriers or at a temperature higher than 110°C.

The molecular weight is a significant parameter in Disperse dyes’ behavior. Based on this parameter, they are divided into the following groups:

1. High energy -S- dyes, which have low molecular weights and thus having a very good leveling property, therefore resulting a high dyeing rate and a low sublimation fastness property. Dyeing of this group can be conducted by carriers or HT dyeing and are recommended for dyeing pale shades and filament fabrics.

2. Medium energy -SE- dyes, which their molecular weight is higher than -S- dyes. It has a moderate levelling, dyeing rate and sublimation fastness properties.

3. Low energy -E- dyes, which have the highest molecular weight. Therefore, their dyeing rate and levelling is low and sublimation fastness is high.