ADRIENNE HART-DAVIS / SCIENCE PHOTO LIBRARY ADRIENNE HART-DAVIS / SCIENCE PHOTO LIBRARY
Polystyrene packaging. Expanded polystyrene chips each in the shape of an "S". These are widely used as a thermally-insulating and protective packaging material. Polystyrene is the polymer form of styrene (phenylethene or vinylbenzene) which resembles a glassy resin. Expanded polystyrene, as seen here, is made porous and is expanded with trapped gas.
Model release not required. Property release not required.