5
What is the earliest thickness of aluminum foil used as a barrier layer in Tetra Pak packaging?
EXPLANATION
Food Packaging Materials
- Barrier Layer in Aseptic Beverage Packaging (Tetra Pak):
- Aluminum Foil Barrier:
- Aseptic Tetra Pak cartons incorporate an aluminum foil layer to provide an absolute hermetic barrier against light, oxygen, and external vapors.
- Official Answer Key: Designated 0.09 mm (Option 1) as the credited answer.
- Conclusion: 0.09mm (Option 1).
Correct option: (1) 0.09mm
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