In surface mount processing and welding technology, many customers usually have a requirement for the brightness of solder joints.In the process of surface mount processing and welding, it cannot be guaranteed that the brightness level of each welding point can meet the requirements. What is the reason for insufficient gloss of solder joints?The tin powder in the solder paste has oxidation phenomenon.Solder paste has additives in the flux itself to form extinction.In solder joint processing, the...