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Some tin cans have a thin stripe down the side which isn’t painted. What is this stripe and why is it left bare?

April 26, 2017cans isn’t Left painted stripe tin

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Some tin cans have a thin stripe down the side which isn’t painted. What is this stripe and why is it left bare?

1 Answer

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The can is made from a flat sheet of metal which is decorated whilst it is still a flat form. It is then cut and rolled into a cylinder and the two edges are welded together. The welding process makes the metal very hot at this point and any decoration would be scorched and discoloured hence the metal is left bare.