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The black stuff on a penny is often tarnish or corrosion, primarily caused by the reaction of copper with moisture and air, leading to the formation of copper oxide. It can also be due to dirt, oils, or other contaminants. In some cases, it might be a residue from chemical reactions if the penny has been exposed to acidic substances. Regular cleaning can sometimes remove this black residue, but care should be taken to avoid damaging the coin.
What else can I help you with?
How much was the penny black?
It was black and it cost One Penny, that is why it is called the Penny Black.
What were Victorian pennies called?
a penny black
What is the black stuff called that comes out of an octopus?
What is the black stuff that comes out of an octopus
Rowland Hill invented the post stamp where as then ikt was called the penny black?
This first postage stamp was issued by Great Britain in 1840. It is called the penny black because it sold for a penny and is black in color. It pictures Queen Victoria.
The first stamp called the Penny Black was produced in?
The first stamp called the Penny Black was produced in 1840 in the United Kingdom. It featured a profile of Queen Victoria and was used to prepay postage. The Penny Black is known for being the world's first adhesive postage stamp.
The first stamp issued in the world was called?
It was called the Penny Black, and showed a profile of Queen Victoria.
What was the worlds first postage stamp called?
The Penny Black. Wouldn't it have been quicker to find out yourself though?
What was the first postage stamp called and when was it invented?
The One Penny Black was created in 1840.
What was the name of the first stamp ever issued?
It is called the penny black for obvious reasons.
What is the black stuff that people are covered in after an explosion called?
Soot.
When was Penny Black - film - created?
Penny Black - film - was created in 2013.
What has the penny red have that the penny black does not?
perforations
