In article ,
Jim H wrote:
The stuff I use is lead-free. It was on special offer so hardly more
expensive than 60/40. It contains some small amount of silver (10%). I
quite like using it - Lead free has a lower melting point, so easier to
do large joints without a high power iron.

Although lead free is common for mechanical soldering - like copper tube -
I understood the need for it was giving the electronics industry real
headaches. ;-)

--
*A bartender is just a pharmacist with a limited inventory *

Dave Plowman London SW 12
RIP Acorn