Comparing the Effectiveness of KPU Special Anti-Yellowing Agent in Different KPU Articles 🌟 Introduction: The Battle Against Yellowing In the world of synthetic materials, especially polyurethane (PU) and its cousin, thermoplastic polyurethane (TPU), yellowing is a notorious villain. It creeps in slowly but surely—sunlight, heat, oxygen, and time all conspire to turn once-pristine white or...