I needed more solder ribbon for resistance soldering, so I figured I should make a batch of the stuff. Put a length of silver solder between folded paper, hammered it on the vise anvil with a polished brass hammer, and it worked fine.
Flushed with success, I did the same with some ordinary rosin-core lead solder for the next time I must solder a shield or some such.

Just snip off the appropriate length and fire up the iron…