Intrawite™ Intrawite™ is a line of optical brighteners that produce strong white effects on synthetic fibers such as polyamide, polyester and polypropylene. It is also effective for organic materials such as papers, waxes, fats and oils. Paper & Nonwovens Plastics Wood & Stains Key Features Creates a high whitening effect and adds a bluish cast in a variety of applications Fluoresces blue under UV light Applications Plastics and polymer resins Papers, nonwovens and other celulose-based products Adhesives Document Request Form Request A Sample Contact Us