Welcome to the Forum!  

Generally you want to ensure the part is fully cured before demoulding. 

The cure times vary depending on the resin you use, but for small pieces under 10mm thick, I would look at our GlassCast 10 Clear Epoxy Casting Resin which has a demould time of 24 hours at 20C. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I am new to using the glass resin and am going to start making my own jewellery with it, can someon3 let me know how long it takes to dry and when is best to remove from moulds