Copper Wire Round Solid Bare 0.2mm 0.3mm 0.4mm 0.5mm 0.6mm 0.8mm 1mm 2mm to 5mm

For delicate wire-wrapping around beads and cabochons, 0.2 mm–0.4 mm is typically used for binding and weaving. For structural frame work and loops, 0.6 mm–1 mm provides enough rigidity to hold shape after forming. Heavier structural elements such as bangles or cuffs generally use 1.5 mm–2 mm. Start with 0.4 mm or 0.6 mm if you are new to wire-wrapping.

Yes. Solid bare copper is a standard conductor material for grounding leads, earthing straps, and hand-wound coils (such as Tesla coils, inductors, and transformer primaries). Because it is uninsulated, ensure adequate clearance from adjacent conductors or apply your own sleeving where required by your application.

Bare copper oxidises naturally when exposed to air and moisture, developing a darkened patina over time. For jewellery applications, many makers intentionally accelerate this with liver of sulphur to create an antique finish. To slow oxidation, store unused wire in a sealed bag or apply a clear lacquer after forming. For electrical connections, oxidation at contact points can increase resistance — use appropriate connectors or solder joints.

Yes. The bare uncoated surface accepts solder readily with standard rosin-core or lead-free solder and a suitable flux. No stripping or pre-treatment is required. Lightly abrade the surface with fine sandpaper if the wire has developed surface oxidation before soldering to ensure a clean joint.

For single jewellery pieces or small prototypes, 1 m–5 m is usually sufficient. Workshop or classroom use typically suits 10 m–30 m coils. For ongoing production, craft studios, or electrical projects requiring continuous runs, 50 m or 100 m coils offer the best value per metre. Note that larger diameters (4 mm–5 mm) are available in shorter maximum lengths due to coil weight.

Yes. Bare copper anneals easily by heating to a dull red glow with a torch and then quenching in water or allowing it to air-cool. Annealing restores softness after work-hardening from repeated bending or drawing. This is a standard technique in jewellery making and metalsmithing to maintain workability throughout a project.

Yes. The bare copper surface bonds well with vitreous enamel (kiln-fired), cold enamel, UV resin, and epoxy resin. Clean the surface with acetone or isopropyl alcohol before applying any coating to remove handling oils and ensure adhesion. Thinner gauges (0.2 mm–0.8 mm) are particularly popular for enamelled wire jewellery and resin-filled wire frames.