Features: Feature:melting, covering, insulating, preventing oxidation Usage: Jewelry metal welding, fusion- welding ingredients, used in the welding process to provide a more smooth and faster soldering powder for solder- joints The welding powder is a powdery aluminum gas welding flux with a melting point about 560 ℃. It can effectively damage the aluminum oxide- film and can easily absorb moisture, causing corrosion of aluminum in the air-. After welding, the residue- must be brushed clean from the metal surface Used： as a flux and refining agent in gas welding of gold, silver, and aluminum alloys. This flux should be stored in a dry place to prevent moisture. Specifications: Item: Welding Powder Weight：approx 250g Material：Aluminum-Gas Welding Flux Melting point about: 560 ℃ Package Includes: 1 Box x Welding Powder note: Matters needing attention: 1. Before welding, the welding site and welding wire should be cleaned. 2. Apply a paste- of flux mixed with water to the welding wire or simmer- one end of the welding wire to soak in an appropriate amount of dry flux, and immediately apply welding. 3. After welding, the flux residue- on the surface- of the workpiece must be cleaned with hotwater to avoid causing corrosion. 4. This flux should be stored in a dry place to prevent moisture.