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The silver exposed to air combines with oxygen in the air to form silver oxide which is black.
Tuttle Silver Company was created in 1890.
Chlorine is commonly tested for in water to ensure safe drinking water and swimming pool maintenance. It is also monitored in industrial processes to prevent corrosion and contamination. Chlorine levels are typically measured to meet regulatory standards and to maintain overall health and safety.
The Silver Dollar at Fairbanks, Alaska sometime in 1965 or 1966
Stieff Silver Company Factory was created in 1925.
meriden b company is a sterling silver (hallowware) manufacturing company that made sterling silver pieces. They were established in the 1800's Can you always trust the 'sterling' mark on this company's silver?
It is a company that makes silver-plate objects. Started by a guy named Poole.
Yes
it reacts with h2s gas present in air to form black silver sulphide so it looses it shine
The company that has a blue hexagon with a silver spade as their logo is Piaggio.
ornaments of silver look dull because silver reacts with h2s gas present in air to form black silver sulphide so it looses its shine