1.Suitable for whitening chemical fibers, 2.such as the polyester fibre, nylon fiber, polypropylene fiber and so on. 1. Suitable for whitening chemical fibers, such as the polyester fibre, nylon fiber, polypropylene fiber and so on. 2. Suitable for whitening and brightening polypropylene plastic, hard PVC, ABS. EVA, polystyrene, polycarbonate, etc. 3. Suitable to be added into the conventional ...