How do you tell if the wire is a real copper wire?
Cut off a small plastic skin and check the copper wires inside. Touch the top of copper wire with palm, copper core wire, copper core should be purple, shiny, soft feel, it is real copper wire.
Peel the wires off one end of the 2cm, then rub them slightly over the core with a sheet of white paper. If there is a black substance on the white paper, there is a lot of impurities in the copper core. And inferior copper wire color slants black, hardness is bigger. The copper twisted into a small circle, if too many impurities such as copper wire, copper clad steel wire will rebound, copper is not good rebound, circle. The copper wire is slowly straightened and restored, and when it is fully recovered, it turns out that your copper wire material is really good
The color of copper wire is bright and red, which is real copper wire. Inferior copper core wire, copper core for purple black, yellow or partial white, impurities, mechanical strength, toughness is not good, a little effort will break, and the wires are often broken.
