To improve the aesthetic appearance of post-consumer recycled (PCR) materials, adding colour is an important process. However, achieving consistent colouring is often hindered by the varying quality of recyclate and different processing techniques. With other considerations ranging from sustainability goals to adhering to constantly evolving regulations, effective colouring presents a never-ending series of challenges for converters and recyclers. Colour will vary strongly in recyclate due to the uneven mix of post-consumer materials in a typical waste stream.

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