Quote from: Shermand100 on October 31, 2017, 08:40:58 PM

Yeah, to replicate it exactly then the laser etcher was something like this one...

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F282624625105

And as for chemicals it is just table salt and water for the etching solution. The added copper sulphate is optional and only about £3 on ebay or amazon.

As I've said before though this can be done with a paper laser toner printer to the same effect, and heat transfer the image to the metal before etching. Someone did this years ago and made a guide here:
http://www.instructables.com/id/A-Stainless-Steel-Bitcoin-Wallet/

There are easy ways to avoid the setup costs, the easiest by having access to the office printer at your work would do it.

Thanks for that, I've checked the instruction of etching. It's really straight forward, I'm planning to try it out sometime.
What I would change is:
For me, it looks easier to just put my seed on the steel card, because I can easily import it into any kind of wallet in a few minutes. In this case, if someone finds the card with some words on it, it won't be easy to determine if it's a seed, and for which kind of cryto and what kind of wallet it is useable for.
Also, if I etch the seed into two cards (half of the seed to the first card, second part of the seed to the second card), I can place them to different offsite locations. In this case I don't need to worry if someone finds the card, because the other part is far away. Just to be a bit too cautious