Alpha HiFlo 63Sn/37Pb solder alloy is manufactured with virgin metals process through Alpha’s proprietary viscosity and dross lowering treatments which create the purest, lowest drossing, highest fluidity solder. HiFlo is then alloyed and cast in a closed-loop injection system under a nitrogen blanket which leaves it free of cast-in impurities and included oxides. This enhances its low drossing characteristics.