Buck BK-220 high-quality rosin flux rosin solder auxiliary oil rosin solder flux block , Performance: This product is made with natural rosin, with superior weld strength, non-corrosive, non-irritating to humans, the environment pollution. Purpose: For the maintenance and circuit experiment, product development and other manual welding general consumer electronics products. Pine rosin is outflow of oil inside the trunk high temperature melt into watery, later to become dry bulk solids (no fixed melting point), its dark red color brown, the main application of flux when soldering electronic circuits, mainly used in musical instruments to rub the strings of the instrument to make it play a role astringent. Since the oxide film will generate a metal surface in contact with the air, the higher the temperature, the more powerful oxidation. This layer of oxide film to prevent liquid solder wetting role of the metal, like the stained glass oil will make water not wet the same. Flux is used to remove the oxide film of a special material, known as flux. Flux has three main functions: 1. In addition to the oxide film. Substance is a substance flux reduction reaction occurs, thereby removing the oxide film, the reaction product into a suspension of slag, floating in the solder surface. 2. To prevent oxidation. After melting, floating in the solder surface, forming an isolation layer, thus preventing the oxidation of the welding surface. 3. To reduce the surface tension. Increase the mobility of solder, solder wetting help weld.

• BK-220 high-Quality Rosin Flux
• To prevent oxidation. After melting, floating in the solder surface
• To reduce the surface tension. Increase the mobility of solder, solder wetting help weld.
• Weight - 20g each 2 pic 40g