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.