(12)When considering the circularity of a product, the design and production phases are key for ensuring durability and potential re-use of the product and for its recyclability. Those phases are also imperative for reducing the content of hazardous substances and substituting substances of very high concern in materials and products throughout their life cycle. The technical screening criteria for manufacturing activities that substantially contribute to the transition to circular economy should therefore set design requirements for products’ longevity, reparability and reuse, as well as requirements on the use of materials, substances and processes that allow for quality recycling of the product. The use of hazardous substances should be minimised. Where possible, the criteria should also require the use of recycled materials for the manufacturing of the product itself.