Is the solder paste with unlit solder joints fake?

In useSolder pasteAfter reflow soldering, some solder joints are very bright while others are rather dull. Why is that? Could it be that the solder joints that are not bright are fake solder paste?

Is the solder paste with unlit solder joints fake? Of course not. Whether the solder paste solder joints are bright or not is determined by the characteristics of the solder paste itself. If the solder paste is an alloy eutectic, the effect of its soldering will be relatively bright, such as solder pasteSn63Pb37It is an alloy eutectic, so the solder joints are relatively bright. If the solder paste is neither alloy nor eutectic, the soldering effect will be relatively dull, such as0307,305Wait for solder paste. 

Therefore, the authenticity of solder paste cannot be judged by whether the solder joints are bright or not. If you need more knowledge about soldering, please continue to follow the online message of JJY Solder Paste Manufacturer to interact with us!