The trays for CDs and DVDs usually consist of PP (polypropylene) and PS (polystyrene). These are easy to recognize.

The long covers are usually made of PP, and are tough and flexible. Natural PP is colourless and milky-white transparent.

The square, hard trays are often made of PS, the material is brittle and breaks easily. The clear PS is clear as crystal.

 Naturally, you can increase your yield by separating your waste yourself and offering the various materials separately. Here, it is important to know that the crystal-clear PS tray and the natural PP cover are more valuable when they are separated than other colours.