Why is PA612 filament the preferred choice for high-end glass polishing brushes?

PA612 (Nylon 612) is considered the premium material for glass polishing due to its unique properties. It is exceptionally pure and can be manufactured to very consistent, fine diameters. This, combined with its optimal flexibility and low abrasiveness, allows the filaments to remove microscopic imperfections and buff the surface to a high-gloss, scratch-free finish without causing any damage to the delicate glass.