Cobalt

By 2011-03-01T00:00:00

A glass bottle coloured by cobalt

Source: Dreamstime

Vitamin B12, blue glass and invisible ink

Did you know that cobalt recieved it's name by being cursed? Or that cobalt was found in Tutankhamen's tomb? 

John Emsley explores this fascinating element, and provides a recipe for invisible ink along the way.

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