Answer (1 of 2): It depends on the resin. Many epoxy-based resins cure with the addition of a hardener.and fo not need UV light to cure. Some will cure faster by using the hardener and UV light. The clear casting resins used for crafts are often two-part systems that start to cure when mixed. How
Is sunlight a UV light? - Quora
After 48 hours, is my epoxy resin still tacky in places? - Quora
Can I use a lighter to pop bubbles in uncured UV resin? - Quora
How Long to Cure Resin Prints
How long does it take for gel to dry without UV and LED lights
Is a UV light the same as a black light? - Quora
What is the mechanism behind the formation of epoxy resins? - Quora
Where can I get a UV light? Are they expensive? - Quora
Can you cure gel polish with an LED flashlight if you don't have
Why is resin bound stone a great choice for surfacing in the UK