Tsamba la GPPS ndi pepala lotulutsidwa la PS. Pepala la PS lingagwiritsidwe ntchito Kutsatsa, kusindikiza, zikwangwani, LGP.pepala la polystyene limatchedwa pepala la PMMA kapena Organic glass sheet.Dzina la Chemical ndi Polymethyl methacrylatecrylic.
Tsamba la PS lili ndi zinthu zabwino kwambiri zakuthupi pakati pa pulasitiki, gawo lalikulu ndi polymethyl methacrylate, imagwiritsidwa ntchito kwambiri pomanga, kutsatsa ndi kukongoletsa.