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Experiment: Coca Cola and Drain Cleaner

Home Science1 HN recommenders · 2020–2021
2.7M views · demo · evergreen · Uploaded 2019-05-23

A short experiment dissolving the aluminum of a Coca-Cola can with drain cleaner to reveal the clear plastic film lining inside.

Cited as a vivid demonstration that beverage cans have a plastic liner.

ChemistryEveryday physics & science demos

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4 comments from Hacker News

@BostonEnginerd2020 · in “Industry spent millions selling recycling, to sell more plastic”

They use a thin plastic liner to prevent reaction with the Aluminum. These will burn off when the Al is melted for recycling. Great video here: [VIDEO]

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@MauranKilom2021 · in “Aquafaba”

Here's a demo with a Coca Cola can: [VIDEO] Basically, you don't want any funny reactions with the metal.

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@evv5552021 · in “Lead exposure from routine consumption of coffee and tea from ceramic mugs”

Most metal food containers are coated with plastics like BPA. You can't trust "BPA free" labels because there are now analog compounds in use. For example this is what a dissolved coke can looks like.[1] 1. [VIDEO]

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@nonfxnl2021 · in “Uni-Ball Develops the First Paper Pen Refill”

The (possible) patent has some good details ( [LINK] ) > The ink storage pipe includes an at least two-layer structure of an inner layer in contact with ink and a base layer, the base layer being formed of a paper base material and the inner layer being formed of a resin. The resin is preferably an acrylic resin, polystyrene, a fluorine resin, silicone or a mixture thereof. > In case of applying a resin film, the inner layer 4 has a thickness of typically 3 to 90 micrometre and preferably 5 to 60 micrometre. This honestly seems like the coke cans ( [VIDEO] ). In any case, this should be easier to recycle than the cans.

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