Quote:
Originally Posted by Leo.G
Maybe copper sheet and lead free solder or silver solder?
|
Interesting point, Leo.
The national archives suggests 'copper alloy or high alloy stainless steel' and to 'avoid the use of soft lead solder as this will deteriorate faster than the rest of the capsule'.
https://www.naa.gov.au/information-m...g-time-capsule
