Polystyrene Ceiling Lamp is created by dissolving polystyrene in acetone and overlaying it over a transparent balloon. Dissolving polystyrene in acetone creates a yogurt-like substance that is easily able to form in any shape. With its substance, it it placed over an blown-up transparent balloon and left to air dry for several hours (time depends on the thickness of polystyrene/acetone substance applied). Over time, the acetone from the substance will evaporate, making the styrofoam into a hard but fragile form.