Want to create stunning refillable resin pens? Learn how to use silicone molds to craft beautiful, custom pens that you can use over and over again! Perfect for gifts or selling. 🖊️ $15M ...

Casting parts in silicone is great, and 3D printing in resin is fantastic for making clean shapes, so it’s natural for an enterprising hacker to want to put the two together: 3D print the mold ...