一.Product description AXE-309 is a water-soluble copper antioxidant, the air contains sulfur and sulfur dioxide, so that the copper surface produces natural oxidation, in order to prevent this phenomenon, so to protect the copper surface, so the copper surface antioxidant AXE-309 is developed, suitable for printed circuit board PCB/FPC electroplating copper layer or electroless copper layer. 二.product advantages 1. Excellent ability to prevent discoloration; 2. It has a long duration of prevention and control of discoloration; 3. It can be used at room temperature, and the operation is simple; This film can be removed with acid or detergent, and has no effect on the subsequent plating.