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Effect of natural impurities induced in repeated melting is investigated on thermo-mechanical and reflectance characteristics of commercially available pure copper. Copper samples of three different material characteristics are prepared, which are obtained from direct copper ingot, from melted copper and finally from re-melted copper. Samples are then cold rolled in three different stages as well as age hardened by isochronal and isothermal annealing. Series of experiments are then conducted to measure the changes in microhardness, thermal conductivity, reflectance and microstructure of the samples as a function of with and without melting. Most of the thermal and mechanical properties are found to be affected quite significantly by the melting impurities especially when the samples are cold rolled together with age hardening. The reflectance spectrum is also found to be changed with the increase of impurities induced by repeated melting of copper. [ABSTRACT FROM AUTHOR]