Altshausen, 14September, 2022–Plastic packaging serves important functions in modern life, and we have come to rely on it heavily. It is an exceptional product that, however, has a significant end-of-life problem. This is especially true of black plastic, which until very recently couldn’t be detected with the available technology, Near Infrared (NIR). “The emitter shines a light on the material and the sensor takes a reading of the energy that is reflected back,” says Enrico Siewert, Director of Product and Market Development at STADLER. “However, carbon black absorbs the light, so the signal doesn’t bounce back and the sensor doesn’t get a reading. This means that black plastic is undetectable with the technology that is widely deployed in the recycling infrastructure.”