[alchemist1e9]

How cheap are laser engraving machines? For ultra critical keys and generationally important data this sounds like a really good idea. I use M-disc currently but an engraved A4 or Letter size scannable durable material seems like the best option if it is available.

Edit: would this work?

https://a.co/d/5fWJaEa

Since it seems to accept an image, the question is what material would be best to run it on and then have it be scannable well on a standard flat bed scanner, which almost certainly will be available in some form as long as our current civilization survives.

[ThrowawayTestr]

You can get table top models for 1-2k.

[throwuwu]

That’s what I was thinking of

[alchemist1e9]

Any opinions on best material to be scanner later on flatbed?

[throwuwu]

Not sure but if you want to use a flat bed scanner then maybe if the engraving is deep enough you could just ink the plate and then press a sheet of paper onto it and scan the paper instead.