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- Factors Shaping Brightness in Polypropylene-Based FabricsOptical Brightener Powder and Fluorescent Whitening Agents for woven bags provide manufacturers a straightforward way to adjust the visual tone of polypropylene packaging materials. Their purpose centers on appearance refinement rather than structural enhancement, helping factories maintain consistent surface color even when resin properties vary slightly. Technicians calibrate...0 Comments 0 Shares 603 Views