Because without them, the residual oil of the surface of crisps would react with oxygen from the air and give them a stale flavour.
In addition to potatoes, oil, and salt, Walkers Crisps may contain added seasonings like paprika, cheese powder, or onion powder. Preservatives and antioxidants may also be used to maintain freshness and prevent oxidation of the oils.
Nitrogen
Nitrogen gas is usually used to fill packets of crisps. This helps to prevent the crisps from becoming stale by reducing the amount of oxygen inside the packet.
The collective noun for crisps is a packet of crisps.
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nitrogen
The equipment for breaking crisps typically includes a food processor or a heavy-duty blender, which can crush the crisps into smaller pieces or crumbs. Alternatively, a rolling pin can be used to crush them manually by placing the crisps in a sealed plastic bag and rolling over them. For larger quantities, industrial machinery like a granulator may be used in commercial settings.
The collective noun for a group of crisps is often referred to as a "packet" or "bag" of crisps. While there isn't a widely recognized term specifically for multiple crisps, these terms are commonly used when discussing them in groups.
You remember then crisps called Cheetahs? There's your answer.
Antioxidants being used as food preservatives in margarine is a chemical property because it involves the interaction of the antioxidants with the molecules in the margarine to prevent oxidation and spoilage.
Nitrogen gas is used to fill bags of crisps to prevent them from getting squashed. Nitrogen is an inert gas that helps maintain the freshness and crunchiness of the crisps by minimizing the effects of oxidation and moisture.
Nitrogen gas is commonly used in crisp packets to help maintain freshness and prevent the crisps from becoming stale. Nitrogen is an inert gas that does not react with the crisps or affect their taste.