Some.
Or copper. Brass, tin, nickel, steel, aluminium, etc.
Modern low end ones are carbon paint. The same ink used for a cheque or paper bus pass.
Silver definitely exists. And yes, acid recovery is possible. For all the metals and transition minerals.
Here my, I’m not responsible if you melt your arms off quick suggestion guide.
shred the Myr first.
Confetti works, diamond cut is better
Add shred slowly. Don’t dump it all at once
When you have your clean liquid blend (no solids) don’t stop. Keep going another few days
Not to dissuade or deter you;
The thing those refiners fail to walk you through is what to do when your done. That toxic mess of liquid plastic in acid.
Look into that up front for two reasons. Not only is it hazmat,
Clean plastic is worth money.
Even in a chlorinated or high nitrogen solid.
You’re going for the silver. So reconstitute the plastic as well. A pound of PCI-ASN is $1.20-$1.50 right now.
Recovered properly it usually hardens into a stringy confetti like rabbit bedding.
Also, acid, You can clean and reconcentrate it indefinitely.
So do your research first.