Cationic Dyes are modified basic dyes and are available in both liquid and powder form. This is a class of synthetic dyes, that act as bases and when made soluble in water, they form a colour cationic salt, which can react with the anionic sites on the surface of the substrate. These dyes produce bright shades with high tinctorial values, on textile materials. This range offers a good selection of dyes to meet the brightness and fastness requirements for a variety of end uses. Suitable appliances are wool, silk, cotton and modified acrylic fibres. Usually acetic acid is added to the dye-bath to help absorb the dye onto the fibre. These dyes are also used in the coloration of paper.