If you’re helpless to know the difference, then check out [Eric Strebel]’s 9-minute masterclass teaser video on making a two-part mold for resin casting, which is also embedded below.

So I’ll be making a matching set of buttons. You’ll need a basic resin casting set ... any air trapped in the mold will compress to the right dimension under casting pressure.

Rapid prototyping uses three-dimensional (3D) computer aided design to quickly fabricate a part or, alternatively, a sand mold for casting a part from metal ... 3D layering and CNC machining system.

I am making furniture out of broken glass and epoxy resin. Recycling ... glass I created from other mold making projects and used it as a glass aggregate for casting this piece of epoxy furniture.