How Does Boxed Milk Stay Fresh? Understanding UHT Pasteurization

Discover how ultra-high temperature pasteurization keeps boxed milk fresh without refrigeration.

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Boxed milk doesn’t go bad quickly because it undergoes a process called ultra-high temperature (UHT) pasteurization. This involves heating the milk to around 135°C (275°F) for a few seconds, which kills all bacteria and spores. The milk is then packaged in sterile, airtight boxes, preventing contamination and giving it a longer shelf life without refrigeration.

FAQs & Answers

  1. What is UHT pasteurization? UHT pasteurization, or ultra-high temperature pasteurization, heats milk to 135°C (275°F) for a few seconds to kill bacteria, allowing it to last longer without refrigeration.
  2. Can boxed milk spoil? Boxed milk can spoil if it is opened and not refrigerated. However, unopened UHT processed milk can last for several months.
  3. Why is boxed milk packaged in airtight containers? Airtight packaging prevents contamination and keeps the milk fresh by blocking out light and air, which could spoil the milk.

Watch More

If you're interested in food preservation techniques, check out our videos on canning methods and freeze-drying food for longer shelf life. Understanding these methods can greatly enhance your knowledge on how to keep food fresh.

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