Copper foil - Main uses: welding and soldering, cutting tools, and precision parts. - Purity: greater than 99%. - Key properties: smooth surface with good electrical conductivity, thermal conductivity, ductility, and other processing properties. - Why it matters: high purity and smooth surface support reliable electrical and thermal performance and ease of fabrication. Copper sheets - Primary applications: crafts, paper circuits, and art projects. - Conductivity and versatility: used to make wires and cables; widely used in the manufacture of instruments and gauges against magnetic interference. - Why it matters: versatile form for creative projects and functional components with effective magnetic shielding. Copper plates - Material performance: good plasticity, good mechanical behavior, and good thermal stability. - Processing and forms: easily processed with hot and cold pressure. - Possible shapes: can be processed into strips, plates, films, wires, rods, pipes, etc. - Why it matters: reliable formability and stability for complex fabrication and diverse component needs. Practical use scenarios - Electronics and electrical fabrication: use copper foil for soldering, welding, and making reliable wires and cables; apply copper sheets or plates in components requiring good conductivity and shielding. - Arts, crafts, and paper circuits: employ copper sheets for decorative elements, circuit experiments, and educational art projects. - Instrumentation and magnetic shielding: leverage copper sheets or plates in instruments and gauges to reduce magnetic interference and improve measurement accuracy.