Environmental protection solder wire can be distinguished from the following aspects:

1. From the appearance of tin luster color: environmental protection tin line is light yellow.

2. From dao metal alloy composition: environmental protection tin line is basically free of lead (EU ROHS standard is less than 1000PPM of lead), environmental protection tin line generally contains tin, silver or copper metal elements.

3. Hand rub method: No lead will have a light yellow trace, because no lead usually contains copper metal.

4. On the outer packaging: the packaging box of environment-friendly tin line is generally green.

Solder wire generally refers to solder wire. The name is usually solder wire. The solder wire is composed of solder alloy and additives. The alloy components are divided into solder lead and lead-free additives and evenly poured into the middle part of tin alloy.

Different types of solder wire auxiliaries are different. Auxiliaries are part of improving the auxiliary heat conduction of solder wire in the welding process, removing oxidation, reducing the surface tension of the welded material, removing the oil on the surface of the welded material, and increasing the welding area. The characteristic of the solder wire is a tin alloy wire with a certain length and diameter, which can be used with the electric iron in the welding of the electronic original device.