Optical brighteners are compound that fluoresce under UV light, reemitting in the blue region of the spectrum. Optical brightener masterbatches are used to produce materials that require ”extra whiteness”. the emission of blue light causes a white product that may typically have a slight yellow cast to appear whiter. Optical brighteners are also often used in colorless or white anti-tampering seals, to permit rapid confirmation of the seal’s presence when viewed under UV light. Optical Brighter (OB) Master Batch has been recommended for the Injection molded plastics, film & Sheet.
• Improve initial color.
• Reduce Yellowing of plastics.
• Improve whiteness of recycled polymer.