PS / Polystyrene Polystyrene is a transparent material with high rigidity and hardness. Featuring low ductility and susceptible to breakage under stress, it has a colourless transparency and forms a luminous surface. The material also bonds with ease. Polystyrene contains no plasticizers or other additives and is dimensionally stable, making it a good alternative for use on plastic packaging. Available in different modified film variants, it is relatively easy to punch.