... NT 150G Original white paste, Neutral acid-free solder paste to for BGA Specifications1, the help of welding effect extremely ... neutral PH value, insulation is strong, welding surface smooth. Apply to cell phone, PC boards and other precision electronic chip level ... acid is better. Used in general instrument, copper, tin, iron to wait JinShuQi welding.Welding before wipe clean surface of article, put ...