Native Copper – Microstructure of native copper (112 HV). Note the extensive slip lines. Color micrograph was taken with crossed polarized light plus sensitive tint.
High-Purity Copper (99.89%) – Microstructure of hot extruded, cold worked and annealed (500 °C) high-purity copper etched with equal parts ammonium hydroxide and hydrogen peroxide (3% conc), 46 HV.
High-Purity Copper (99.89%) – Microstructure of hot extruded, cold worked and annealed (500 °C) high-purity copper etched with klemms III and Beraha’s PbS tint etches and viewed with polarized light plus sensitive tint, 46 HV.
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