Boss Laser · Learn
Materials & Safety
Every material behaves differently under the beam, and a few of them are genuinely dangerous. This is the cluster to read before you put something unfamiliar on the bed.
Most laser problems are material problems. A sheet that looks identical to the one that cut beautifully last week can char, melt, catch fire, or release something that damages both you and the machine. The single most valuable habit in laser work is knowing what you’re about to cut — and being willing to not cut it when you don’t.
In this guide
Eight ways in
Start with what never goes in the machine. Then take your material one at a time — each page covers how it behaves, what a good result looks like, and where it bites.
What Must Never Go in a Laser
Read first · Safety The short list that damages you and the machine — and the difference between “dangerous,” “poor results,” and “hard on the hardware.”Acrylic
Plastic The showcase material — and why cast and extruded behave nothing alike despite looking identical.Polycarbonate
Plastic · Caution Looks like acrylic, behaves nothing like it. Why it yellows, burns, and generally disappoints.Delrin / Acetal
Plastic · Engineering Crisp engineering parts with excellent dimensional stability — plus the fume caution that comes with it.Anodized Aluminum
Metal · Marking The one metal a CO2 laser marks beautifully — because you’re not marking the metal at all.Glass
Brittle Frosting and engraving work well; cutting doesn’t. What’s actually happening at the surface.Which Plastics Cut Well
Plastic · Overview A ranked, honest guide across the common engineering and display plastics — including the ones to refuse.Kapton, Mylar, Cork & Paper
Niche stock The thin stock — fast and satisfying to cut, with fire risk as the thing to respect.Boss Laser · Learn
Understand the physics, respect the machine.
Everything on this page comes back to one idea: what a material does under the beam depends on how it absorbs that wavelength and what it turns into when it heats. Once that’s clear, most material questions answer themselves.