What packaging method involves removing all air from the container before sealing?

Vacuum packing is a method that specifically involves the removal of air from the container before sealing it. This process works by using a vacuum sealer that extracts air from the packaging, thereby significantly reducing the presence of oxygen. By doing so, vacuum packing helps to inhibit the growth of aerobic bacteria and mold, which can spoil food. Moreover, reducing oxygen levels can also help to slow down the oxidation process, preserving the quality, flavor, and nutritional value of the food for a longer period.

This method is particularly advantageous for both short-term and long-term food storage, as it allows food items to maintain their freshness while preventing freezer burn for items stored in a freezer. Vacuum packing is commonly used for meats, cheeses, and other perishable products, making it a widely acknowledged standard in food preservation and packaging.