Cellophane is so thin and flimsy. What makes the wrapper on my Ritz crackers crackle and crinkle like a firework?
In: Physics
Packaged food manufacturers have certain requirements for their food packaging. Some of these are best solved by cellophane – it retains shape well (so it looks good on shelf), it’s largely water and gas impermeable (so it keeps things fresh), and is shiny (again, looks good on shelf). Strangely, the sound plays a role too – for many products, consumer testing shows that people expect a certain level of crinkling but more or less is not good – if it doesn’t crinkle enough, it is interpreted as “old, stale, old-fashioned, earthy”, if it crinkles more than expected “it’s annoying, artificial, distracting”…..
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