Permitted?
I know it smells, so wouldn’t do it in company, but is it otherwise OK?
Laser cutting leather
I think the issue is that you don’t know what additives have been used to cure the leather…
If you’ve cured your own, on the other hand…
Yeah thats the major issue is is it real leather, and what was it cured with. It’s also possible that laser cutting could release hexachromium.