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To anyone reading: think very carefully about what you're doing before pointing high powerful lasers at glass.

Are you worried that the glass might overheat and break, or that it might produce a more dangerous specular reflection than Krasnow's polished stainless foil?

Reflections. I don't think it can keep heat more than steel does.

I think the reflections from glass will be about 5% of the reflections from polished stainless steel. So, while in general I strongly endorse your point, I don't think it applies in this context.

Makes sense.

Is there any risk of the laser going through the glass and damaging parts of the machine? Or things such as refraction?

As I understand, those machines have a sheet of materials they can work with. This is probably the safest way to go: just stick with the materials the laser is made to safely operate on.

I don't know.

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