After making injection molds from silicone and resin+metal oxide, I finally tried making a straight resin 3D printed mold. Instead of using my regular 3D print resin, I tried Siraya Sculpt Ultra White (and later, regular Siraya Sculpt) and was very surprised by the results. SIRAYA SCULPT RESIN:https://amzn.to/36qMC0mMORE SIRAYA RESINS:https://siraya.tech/collections/all?page=2 LNS 150A INJECTION MOLD MACHINE:https://www.techkits.com/products/model-150a/ALUMINUM MOLD FRAMES:https://www.techkits.com/products/mold-epoxy/