What liquids have the lowest refraction?

I Cast Fist@programming.dev to

Ask Science@lemmy.worldEnglish · 10 months ago

Asking this because I’ve been thinking about resin printing and how a small layer of said liquid could, in theory, be used to make the prints faster and negate any problems regarding the FEP film (which can wrinkle, tear and be a hassle to clean when small pieces are stuck to it). The ideal liquid would have to be:

Inert to UV light
Not miscible with the resin
Denser than 1.25g/cm³

Maybe the liquid doesn’t even need to have a small refraction, so long as the light doesn’t diffuse too much after going through ~1mm of it. That or doing some compensation on the print.

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