Solder-filled Sterling Silver Round Wire 18 Gauge Dead-soft Temper 24 Inches (2 Feet)
You won't have to add more solder for making chains, jump rings, and some styles of jewelry; create jump rings out of solder filled wire, so you don't have to add any solder and flux to them, and they are clean after they solder.  This is one way you can solder sterling silver  wire. 18 gauge wire, 1.0mm diameter, 24 inches long.Solder-filled silver wire is a 3-metal wire: a solder core surrounded by a copper shell and a fine silver outer layer (solder core: 6%; copper and fine silver shell: 94%). The overall composition is sterling, but the fine silver outer layer provides a better finish than sterling silver. The solder core eliminates the need for additional solder;  flux and use. You can mark it .925 sterling.  You will probably need to pickle it.