It may sound like an old method, but I find it unique and effective.
I don't understand what is the point of creating this kind of backup when you can't even read the seed words and recover yourself 
Sorry for having to say this, but using real acid, lemon juice or any kind of liquid for this is stupid.
This has nothing to do with hardware wallets whatsoever.
THIS.
Get a small safe and some simple home automation sensors. Aqara stuff is cheap and works well.
Use a pair of sensors on your safe.
If the safe gets opened, you get an instant text alert on all your devices.
If the safe gets moved, you get an instant text alert on all your devices.
Add a tiny camera and you can have a picture texted to you too. And the cost for this kind of home automation setup is less than $100 if you DIY.
Home automation is useful for all kinds of things. Nobody but you will know part of your setup is for protecting your seed phrase (and whatever else you keep in the safe).