Tyhjiöistämisen

Tyhjiöistämisen, known in English as vacuum packing or vacuum sealing, is a method of food preservation that removes air from the packaging before sealing it. This process significantly slows down the spoilage of food by creating an environment where aerobic bacteria, yeasts, and molds, which require oxygen to grow, cannot survive.

The primary benefit of tyhjiöistämisen is its ability to extend the shelf life of perishable items. By removing oxygen, the rate of oxidation is reduced, which helps maintain the food's color, flavor, and nutritional value for longer periods. This method is particularly effective for meats, cheeses, vegetables, and grains.

Beyond preservation, tyhjiöistämisen also offers practical advantages. It helps prevent freezer burn by creating a tight seal that protects food from exposure to cold, dry air. Furthermore, vacuum-sealed packaging often takes up less space in the refrigerator or freezer, making storage more efficient. It can also be beneficial for sous vide cooking, as it ensures even heat distribution and prevents water from entering the food during the cooking process.

The process typically involves placing the food in a specialized plastic pouch, which is then placed in a vacuum sealing machine. The machine extracts the air from the pouch and then heat-seals the edges, creating an airtight barrier. While primarily used for food, tyhjiöistämisen can also be employed for non-food items to protect them from moisture, oxygen, or pests.