Tinned copper wires are easier to solder . The tin coating allows solder to flow more smoothly, creating stronger connections. This is especially helpful in electronic and electrical projects where secure joints are important....
Solder is a metal wire with a low melting point. For electronics, it is traditionally a mix of tin and lead. Other alloys are used for plumbing, mechanical assembly and other applications. The various types which are manufactured are Rosin Core...