What are the ways to identify pure copper

1. Check the hardness: the higher the fineness of copper jewelry, the softer the texture and the whiter and smoother the surface. Copper alloy manufacturers take copper bracelets of about 60 grams as an example. If they are pulled open by hand, there is no elasticity, and their fineness is about 95%. If there is a little elasticity, the fineness is about 80%-90%; if the elasticity is large, the fineness is below 70%.
2. Look at the stubble: cut or fold the copper jewelry to see the color of the stubble. If the jewelry is soft, the stubble is thick and soft, slightly reddish, and the color is about 95%; if it is hard to bend by hand, the stubble is white and gray, or slightly red, and the color is about 90%; if the hardness is about 90% Larger, the stubble is light red, yellow-white or gray, and the fineness is about 80%; if the stubble is hard, the stubble is reddish, yellowish, khaki and other colors, and the fineness is about 70%; if the lipstick is black, Or yellow with black, and the fineness is below 60%.
3. Bending method: pinch and bend with fingers, high-quality soft and flexible, easy to bend and not easy to break; low-quality bending is hard, or can barely be bent, and some cannot even be bent with fingers; copper-clad The fake one will crack after being bent or knocked with a hammer a few times; the fake one will not be able to withstand bending and is easy to break. Are there health benefits derived from wearing magnetic jewelry, which often have significant aesthetic value.
4. Throwing method: high-quality copper jewelry, thrown on the board, can’t jump high, there is a “pop” sound; fake or low-quality copper jewelry is light, thrown on the board and bounces very high, making a sound Relatively crisp. The best tips for working with copper jewelry include experimenting with different techniques and thinking about the finish. Untreated copper has a sheen that changes color over time. The two copper blocks along with the thread may be used to make interesting earrings, necklaces, bracelets and rings.
Pure copper, as the name implies, is copper with the highest copper content, because the color is purple-red, also known as red copper. The main component is copper and silver, and the content is 99.5-99.95%. Main impurity elements: phosphorus, bismuth, antimony, arsenic, iron, nickel, lead, tin, sulfur, zinc, oxygen, etc. For making conductive equipment, advanced copper alloys, copper-based alloys.