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铜
*虽然我们不提供供应单未镀铜，我们很高兴根据您的项目需求定制制造。我们有选择地与提供各种尺寸和厚度的最高质量材料的供应商合作。详情请致电询问。铜is a malleable and ductile metal with high thermal conductivity. A freshly exposed surface of pure copper has a reddish-orange color, which will quickly patinate under normal conditions.New copper can look as if it is on fire in low twilight, when the red wavelength of light is more prevalent. The surface of new copper is specular, moderately polished from the cold rolling process, imparting a burnishing effect on the copper. Like gold, copper absorbs most strongly on the red region of the light spectrum, hence reflect more intensely on the red scale. Thus, cloudy days have only a minor effect on the reflected light from gold and copper surfaces.Eventually, the surface of copper will oxidize and decrease in reflectivity, giving way to earthy tones of a dark matte, surface. After several years, the appearance will show signs of green verdigris in its crevices, and may completely turn green over the course of decades.
