Optical Brightener OB-1T

Fluorescent Whitening Agent OB-1T, developed by Hongyi Chemical, is a high-performance additive specifically designed for PET synthetic fibers and PP woven bags with a high proportion of recycled content. Its unique formulation effectively enhances the whiteness and visual brightness of materials, while also improving the vibrancy of colored plastic products.This grayish-green powder exhibits strong blue-violet fluorescence, providing an optical brightening effect that makes recycled plastics appear cleaner and more vivid. With a purity of ≥95% and a melting point of ≥110°C, OB-1T ensures stable performance during high-temperature processing.