In this study, the oxygen content of the inert gas flow was varied during Laser-Powder Bed Fusion of of pure Cu-ETP powder with a green laser to analyze the effect on oxygen content in powder and part and the effect on the density and electrical conductivity. Another research question was if a degradation of the powder quality could be observed during 10 cycles of reusing the powder with 1% oxygen content. It was shown that a greatly increased oxygen content of the inert gas has no significant influence on the relative density of the generated components eben though the powder after the process showed large discolorations. The influence on the electrical conductivity is very low even at an oxygen content of 1 %, and conductivity values of over 101 % IACS could still be achieved. Further tests on hydrogen embrittlement showed cracking alonside the grain boundaries for all tested samples so it can be concluded that pure copper samples have high density and electrical conductiviy values but are suszeptible to hydrogen embrittlement and oxygen intake during g of the powder, storage and usage cannot be prevented.