Lead-free solder alloys have been around for as long ... The 0.009% of Ge promotes wetting and prevents the formation of dross. At the core of soldering alloys lies the realm of materials science ...

so it's quicker to use and less challenging to work than lead free solder. However, it's toxic and bad for the environment.

Do you find lead-free solder makes it more difficult to create a good joint? And once you’ve created a joint, how do you know it’s a bad one? Sometimes it’s obvious, it looks grey rather ...