Some people put their food into the freezer before sealing them up in an airtight container or vacuum sealer for several reasons:
Preventing Freezer Burn: Freezer burn occurs when the surface of food is exposed to cold, dry air in the freezer. It can cause dehydration and oxidation, leading to changes in texture, taste, and quality. By partially freezing the food before sealing it in an airtight container or vacuum sealer, they reduce the chances of air getting trapped inside, minimizing the risk of freezer burn.
Preventing Liquids from Spilling: Some foods, especially liquids or semi-liquids, can spill or leak when vacuum-sealed immediately. By partially freezing these items first, the liquid solidifies, reducing the risk of spills during the sealing process.
Maintaining Food Shape: Certain foods can be soft or delicate, and vacuum sealing them without partially freezing can lead to deformation or crushing. Partially freezing helps maintain the food's shape and integrity during the sealing process.
Easier Sealing: Foods like meat or fish can release moisture when vacuum-sealing at room temperature, which may interfere with the proper sealing of the bag. Partially freezing helps reduce excess moisture, making it easier for the vacuum sealer to achieve an airtight seal.
Efficient Storage: Partially freezing food items can make them easier to stack and arrange in the freezer without them sticking together or getting misshapen.
Portion Control: By partially freezing food items before sealing, individuals can portion them into smaller quantities, making it more convenient to thaw and use only what they need, rather than defrosting the entire sealed package.
It's essential to note that while partially freezing food items before vacuum sealing or using airtight containers can be beneficial in certain situations, it may not be suitable for all types of foods. Some items, like fruits and vegetables, may not require pre-freezing and can be sealed directly to preserve their freshness. Always follow specific guidelines for each type of food and the instructions provided by the vacuum sealer or airtight container manufacturer.