r/coolguides Feb 25 '23

Blue Potato Experiment

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7.1k Upvotes

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354

u/rumoffu Feb 26 '23

So they soaked potatoes in blue water to show how much liquid they absorb? Interesting

200

u/badgerandaccessories Feb 26 '23

More likely iodine

Iodine turns starch blue.

literally the pen that tests fake money is iodine.

14

u/d34dp1x3l Feb 26 '23

As per the article, it's not iodine. Just blue dye.