Optical Brightening Agent Optical Brightening Agents is added to many substrates to reduce yellowing, improve whiteness and enhance the brightness of the product. Optical whiteners function by absorbing ultraviolet radiation and re-emitting blue light. The emitted blue light will reduce the yellow color of the substrate and impart a pleasing whiter-than-white appearance. Optical brighteners give more intensity to some colors as well. Different Types of Optical Brightening Agent find suitable application on different substrates like Cellulose, Nylon, Silk, Wool, Paper, Detergents, Soaps, Plastics, Printing Inks, Coatings and Polymers. We are also one of the leading names in the field of Optical brighteners which are also known as optical brightening agents. These have in them capacity to absorb light in violet/ultraviolet region of electromagnetic spectrum ad subsequently re-emit light in blue region. With the coloring matter, be it natural/present as contaminant in fiber being generally decolorized by different bleaching methods, the appearance of textile substrate is creamish after bleaching. Thus it is necessary that chemical treatment is done to neutralize yellow tint of textile fibers.