Question:
Which packaging material is impermeable to light, moisture, odours and micro-organisms and provides total protection to the contents?
Which packaging material is impermeable to light, moisture, odours and micro-organisms and provides total protection to the contents?
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Metal cans and aluminum foils offer absolute barrier properties against light, moisture, gases, and microbial ingress.
Updated On: Sep 15, 2026
- Metal
- Plastic
- Wood
- Paper
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Packaging materials serve as physical barriers against environmental factors that accelerate food deterioration.
Step 2: Detailed Explanation:
Metal containers (such as tinplate steel cans and aluminum cans/foils) provide a complete, hermetic barrier that is entirely impermeable to gases ($\text{O}_2, \text{CO}_2$), water vapor, light, aroma/odors, and microorganisms.
Plastics permit gas and moisture permeation, while paper and wood are porous.
Step 3: Final Answer:
Hence, metal is the packaging material that provides total barrier protection.
Packaging materials serve as physical barriers against environmental factors that accelerate food deterioration.
Step 2: Detailed Explanation:
Metal containers (such as tinplate steel cans and aluminum cans/foils) provide a complete, hermetic barrier that is entirely impermeable to gases ($\text{O}_2, \text{CO}_2$), water vapor, light, aroma/odors, and microorganisms.
Plastics permit gas and moisture permeation, while paper and wood are porous.
Step 3: Final Answer:
Hence, metal is the packaging material that provides total barrier protection.
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