Want to make silicone molds without spending a fortune? We test 4 budget-friendly methods to see which one works best!

His journey into custom DIY optics began while ... high-quality molds of lenses, good enough to try a few casting shots with epoxy resin. [Zach] ran into a few problems along the way, like proper ...

But you’re not done yet. All those little air bubbles in the resin need to be dealt with before it cures. [Chris] puts his filled molds into a pressure chamber, though he mentions that vacuum ...