A solder is a metal alloy material that is melted to create a permanent bond between electrical parts. It is available in both lead and lead-free variants, with diameters of 0.032 “and 0.062” being the most common Inside the solder, core is a material known as flux that helps to improve electrical contact and its mechanical strength.

Lead-free rasin core solder is most commonly used for electronic soldering. This type of solder is usually made from a tin/copper alloy. You can also use leaded 60/40 (60% tin, 40% lead) rosin core solder, but this is becoming less and less popular for health reasons. If you use lead solder, make sure you have adequate ventilation and wash your hands after use.