Nutshells are a non-metallic abrasive. This abrasive is used in blast cabinets. Through their special qualities, nutshells are used in the removal of contamination without affecting the base material. Often used for cleaning turbines and dies.
For example in the petrochemical industry (cleaning turbines), automotive and aviation industries, electronics, rubber and plastics industry (cleaning of dies, among other things). When cleaning it is even able to take up slight contamination. Just like plastic, walnut shells are a very suitable abrasive for removing bubbles after injection moulding.