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What liquids have the lowest refraction?

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:...

Clasm ,

Technically, I believe Mercury fulfills those requirements.

Otherwise, maybe something like Glucose?

There are a few substance here that meet that density: engineeringtoolbox.com/liquids-densities-d_743.ht…

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.

Clasm ,

Ah, yes on the first count at least, though that criteria wasn’t on your bulleted list, I guess it was in the title.

That being said, UV breakdown might not be as concerning in the short term if the substance is removed fairly often. I wonder if a clear gelatin or glycerin layer would last long enough?

I’ve also seen resin-infused paper-like substrate layers of material like carbon fiber attempt to bypass the requirement of an FEP. Each print layer was a new sheet and once the print was done the un-cured material was blown away.

Clasm ,

Top is Treasure PlanetBottom Left is Prince of EgyptBottom right is Atlantis

Clasm ,

Heck, I remember a company car being with around $8k salary-wise a few years ago. That was just for fuel & maintenance.

Clasm ,

It isn’t like their power was just off for the entire time, either. If it’s kicking on intermittently, then that means that the crews are working on multiple issues, done of which aren’t likely to be caught during the initial repair.

You know how long it takes for you to be without power before PSE even considers a refund of a portion of your power bill?

It’s 4 solid days without power.

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