I work with both epoxy and UV resin depending on the type of project.
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I found UV resin works really well especially if you get the high quality brand from Japan. I use the brand Padico. Their latest product is called Star drop which is a UV-LED resin . The best thing about it is that it can also be cured by LED or UV lights.
Pro: LED cure A LOT faster than UV, it can literally cure in seconds, so you don&#;t have to worry about frequent UV exposure. you can use a small LED tourch from local hardware store.
Cons: Curing with LED leaves an oily film on the surface of the resin that just stays there. But that can be easily fixed by simply wiping it off with tissue or put it under the UV light for a minute of two.
And pricy compared to epoxy. But if you get the bigger bottle than it will be a lot more cost efficient.
But sometimes you can&#;t put a price on time right?
I am not sure what kind of project you normally do but I say the UV resin is definitely worth a try.
Goto HumenChem to know more.
Ps, I use it to make ear studs that are 6-8mm in thickness so they are not confined to project that are thin and flat. What I do is I put the mould (clear not opaque) directly on top of the LED tourch.
I want to give other buyers a bit of a non-technical lesson on epoxy cures to aid in their use of the product.
Most people use some variant of a bisphenol A epoxy with an amine based hardener. If the system has a ratio of 1:1 Resin to Hardener, I add 1 or 2 percent more hardener. The tertiary amines that this ratio allows creates better cross link densities and stronger epoxies. This is common practice in curing thermoset urethanes but not in epoxies. I have no idea why.
Epoxy never reaches 100% cross-link cure. It will reach between 90 and 95 percent in about 7 days. If one adds heat to mixed epoxies the cure time is halved for each 10C above ambient. It takes about 168 hours at 22C to cure. If you increase the temperature to 32C it takes 84 hours, to 42C 42 hours, 52C in 21 hours, 62 C 10.5 hours and 72 C down to 5.25 hours.
This little set up can do that for you. I wouldn't recommend anything above 72C epoxy is sticky and a spill can cause nasty burns.
I hope this helps.
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