Query by Sean F: When were compact mirrors invented?

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Answer by ArianaDM
If you imply a little mirror then i can say: from the time men and women noticed that if you blink up metal you can see your face in it, I think the Egyptians already knew copper mirrors.
In the 16th century mirrormakers in Venice invented a mirror of plate glass of which the back was covered with mercury which gave an superb reflection.
The French industrialized the approach in the 17th century, hence generating it a wide spread object.
Therefore the tiny mirror you can open and close like this:
http://www.generallyawesome.com/store/compact-mirrors/double-magnifying-mirror-co.jpg
can not be older then the 17th century.

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When have been compact mirrors invented?
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