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Polystyrene Sun Sheet (PS sheet) is made from Polystyrene particle. The density of PS sheet: is 1.05g/cm3. It is flat and beautiful. It can be used for printing, lighting, lantern box, advertisement and so on. Although Polystyrene sheet not as “high tech” as some other materials, polystyrene fulfils a role that other sheet products have difficulty with - looking good at low cost.