Coated paper is paper with a thin surface layer of clay, calcium carbonate, latex, or plastic resin to improve smoothness and print quality. Clay‑coated grades are normally recyclable through standard paper mills, as the mineral layer separates during repulping. Plastic, PE, or wax‑coated papers hinder fibre recovery and can clog recycling equipment. Some plants use specialised processes to separate fibre from polymer films, though capacity is limited. Choosing water‑based or biodegradable coatings, using mono‑material boards, and engaging local recyclers improve recovery outcomes and reduce environmental impact.