The difference between lead solder and lead-free solder

1. from the tin appearance gloss color on the look: lead solder surface appears bright white, lead-free solder is light yellow.

2. from the metal alloy components: Lead solder is containing tin and lead two kinds of main metal elements (such as: sn63pb37, SN50PB50, etc.); lead-free solder is the basic non-lead (EU RoHS standard is less than 1000PPM of lead, the Japanese standard is less than 500PPM), Lead-free solder generally contains tin, silver or copper metal elements.

3. from the use of points: lead-based solder for lead products, it used tools and components are lead. Lead-free solder for lead-free exports to Europe and the United States and other countries of the product welding, it used tools and components must be lead-free.

4. if the way to distinguish by hand rub: lead will be left on the hand of Black traces, lead-free light yellow traces, because lead-free generally contain copper metal.