English
Firstly, look at the color and smell the scent. The color of the new extruded plate should be yellow. The reason why extruded polystyrene boards on the market have color is because color masterbatch has been added. Poor quality extruded polystyrene boards come in gray, black, and dark colors. When the compression plate ruptures, a pungent odor is smelled. Good extruded polystyrene boards have almost no taste, while poor extruded polystyrene boards often have a spicy taste.
Microstructure. One of the main uses of extruded polystyrene board is energy saving and thermal insulation. The secret of extruded polystyrene board insulation lies in its continuous and uniform surface layer and closed cell honeycomb structure. The more uniform the bubbles, the better.
