What is chromatography?Why is it used to separate different coloured substance present in black ink?
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A technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.
Most nonpermanent markers use inks that are made of colored pigments and water. ... Since the water carries the different pigments at different rates, the black ink separates to reveal the colors that were mixed to make it.
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