Optical Brighteners

Optical brighteners are chemical compounds that work by absorbing invisible ultraviolet light and converting it into visible blue light, which makes the material appear brighter and whiter to the human eye. Optical brighteners can also improve the color appearance of certain materials, such as fabrics, by offsetting
the yellowish tint that can develop over time due to exposure to sunlight or other environmental factors. They absorb light in the UV region of 340-370nm. Typical applications of optical brighteners are Paints, inks or other lacquers, Films and sheets, Synthetic leather, Adhesives, Fibers and other thermoplastic applications.