... Melting, mixing, testing, molding ,bright solder Lead-free solder wire(Ag0.3Cu0.7)Alloy composition Sn99Ag0.3Cu0.7, good copper ... conductivity, thermal conductivity , Solder joints bright, reliable ,Solder wire can be classified according to the different inner core solid core ... wire,rosin-based flux, synthetic resin flux, water-soluble welding ...