Hydrophobic onion skin - GIF

Hydrophobic onion skin.

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Previously:

https://www.homemadetools.net/forum/...572#post193279
https://www.homemadetools.net/forum/...508#post177848
https://www.homemadetools.net/forum/...801#post202144
https://www.homemadetools.net/forum/...650#post201553
https://www.homemadetools.net/forum/...675#post155742

That's the transparent (or nearly so) membrane between the onion layers, and it's acting as a lens under the water where the water and the membrane refract the light at different angles. But it's not actually hydrophobic.