Rosin adheres closely to the surface of solder after being heated and melted, which isolates the contact between air and tin and greatly reduces the oxidation surface of tin, thus improving the thermal conductivity and melting fluidity of solder! Not only the welding adhesion is firm, but also the smoothness of solder joints is good!

Extended data

Rosin refers to turpentine, which can be obtained from a variety of pine trees, especially swamp pine, Caribbean pine and loblolly pine in the southeastern United States, and can also be obtained from similar pine trees all over the world. Exports are cut in these trees to distill and extract high-viscosity secretions (hence the name gum). This volatile liquid is rosin water; The remaining hard resin is called rosin.

Although rosin is not satisfactory as a component of any varnish and pigment, it has always been used as a coating for varnishes and pigments because it is one of the cheapest raw materials. In addition, rosin has many other uses in the art field, such as bonding, sealing and other mechanical functions. Rosin is also called rosin and Greek asphalt.