Solder Bar 60/40 Tin/Lead— The
most popular dipping solder for electronic applications. Its low
melting range makes it ideal for delicate work. 50/50 Tin/Lead— General purpose solder handles standard tinning and sheet metal work. 40/60 Tin/Lead— A good general purpose dipping solder. 30/70 Tin/Lead— Solder for machine and torch soldering.