Canned food is one of the most popular methods of preserving food for long-term storage. It’s convenient, cost-effective and safe to consume.
But how does the canning process work? How do they seal canned food?
The process of canning begins with sterilizing the container that will hold the food. This is done either by heating or chemical treatment, depending on the material used.
Once the container has been sterilized, it’s ready to be filled with the desired ingredients. The ingredients are cooked and then placed into the container while still hot.
Once all of the ingredients have been added, a lid is placed onto the top of the container and sealed shut tightly. The lid creates an airtight seal that prevents oxygen from entering or leaving the can. This helps to prevent spoilage and keep bacteria from growing inside.
After sealing, a vacuum is created inside of the can which helps to preserve its contents. This process is often done using a small device called a “retort” which works by heating up to high temperatures in order to create a vacuum inside.
The final step in sealing canned foods involves pressurizing them so that they become airtight and water-resistant. This is usually done using heat or pressure applied onto the cans after they have been sealed shut with their lids.
Conclusion:
As we can see, sealing canned food requires several steps including sterilization, filling with ingredients, and creating an airtight seal by applying heat or pressure on top of it. This ensures that bacteria cannot enter or leave and helps preserve its contents for longer periods of time.
9 Related Question Answers Found
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