Cellulose powder infills are vital in poster restoration for repairing areas of paper loss. This fine, natural powder seamlessly integrates into the damaged sections, providing a stable and flexible base that matches the original paper's texture. It ensures the infill is almost invisible, preserving the poster's aesthetic and structural integrity. By using cellulose powder, restorers achieve durable and reversible repairs that maintain the artwork's authenticity and longevity, ensuring it can be appreciated for years to come.