Low Temp Metal Casting via the Glowforge

[mpipes]

You can also use cold casting techniques, using metal powders with casting resins instead of metal/heat.

Acrylic Mold Box

The air bubbles get compressed 'til they’re microscopic. Still there, you’d just never see them in an optically clear part and any bubbles on the mold face will not be noticeable on the finished part.