Refractive Powder of high Index 1.93Nd£»1.93Nd glass bead is used for ¡°Exposed¡ªlens¡±type retro_reflactive articles£»Such as open_type reflective sheets£¬reflective fabrics¡£Reflective tape,reflective yarn and ¡°Encapsulated_lens¡±type retro¡ªreflactive articles£¬such as high intensity grade reflective sheet¡£