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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Technically, I believe Mercury fulfills those requirements.
Otherwise, maybe something like Glucose?
There are a few substance here that meet that density: https://www.engineeringtoolbox.com/liquids-densities-d_743.html
But, as far as resistance to UV and immiscability with UV resin, testing would be required, as I’m assuming you intend to replace the FEP film layer with a dense liquid.
Sounds like some sort of oil🤔
