Table 1.

Description of different types of dyes.

Type	Description	Applicability
Reactive dyes	Dyes which have a chromophore capable of making a strong covalent connection on the fabric’s nucleophilic sites.	Silk, wool, cotton, lenin, rayon
Dispersive dyes	Less soluble dyes in water cause dispersion and give color to fabrics via H-bonding and other Van der Waals forces.	Acrylic, polyester, nylon
Direct dyes	Attach to fabrics via adsorption isotherm. For the adsorption of dyes, electrolytes of an inorganic base are added, which highly promotes the uptake of dyes.	Linin, silk, rayon, cotton, wool
Acidic dyes	The dyes are mainly applied in acidic conditions (pH 2–6). Coloring occurs via ionic bonding between dyes and fabrics.	Wool, silk, nylon
Basic dyes	These dyes contain an amine group and have better solubility in alcohol. Coloring occurs via ionic bonding between the dye and negative charges on the network of fabrics.	Rayon, acrylic (solubility is limited)