In article , huLLy
writes
Prometheus wrote:

Lead free solder is impossible as solder is an alloy of lead and tin.
Anything else would not be solder!

Wrong again, see:

http://www.askoxford.com/concise_oed/solder?view=uk
http://www.chemicool.com/definition/solder.html

And you will probably need to replace your soldering iron too.

Unless it's a decent TCP in which case you might only need more mass
rather than a higher temperature.

One important note; do not mix solder types.
--
Ian G8ILZ