Why do chip bags look empty?


Manage episode 289217033 series 2883548
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Maybe you've already asked yourself this question. It's quite natural since there are sometimes very few chips in a bag, especially compared to its size. The reason why chip bags are always half empty is that it is necessary for preservation. In fact, if the chips are exposed to oxygen for too long, they soften and spoil quickly. To keep them edible and crispy, they need to be few in number, and in contact with a particular gas: nitrogen. The absence of oxygen slows down the oxidation of the fatty substances soaking the chips.

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