Film agents are substances used to form a protective or edible film on various food products. These films serve multiple purposes, including preserving freshness, extending shelf life, and enhancing food safety. Common film-forming agents in the food industry include materials like edible waxes, proteins, and polysaccharides. They create a thin, transparent layer that can act as a barrier against moisture, oxygen, and contaminants. This helps prevent food spoilage and maintain the quality of the product.