Tarnished and cleaned silver cups. Silver tarnish is a dense layer of black silver sulfide. It forms over time when silver is exposed to sulfur compounds in the atmosphere | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 5008 px × 3378 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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