Tarnished silver spoon. Silver tarnishes slowly as sulphur compounds in the atmosphere react with the surface to form black silver sulphide (Ag2S) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Terry, Sheila |
Taille de l’image : | 4848 px × 3966 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |