Chromatography is used to separate mixtures of substances into their components.
Paper chromatography is used to separate two different liquids. For example ink, Ink is a mixture of several dyes. When ink is exposed to certain solvents, the colors dissolve and can be separated out. When we expose a piece of paper with ink on it to a solvent, the ink spreads across the paper when the ink dissolves.  Some inks are water-soluble, so you can use water as the solvent. Inks which are not water soluble are often alcohol-soluble for example rubbing alcohol as the solvent to create your chromatography. 

Using an example of a suitable mixture, describe how can we separate the mixture by the given method 

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Once this is completed, carefully attach the strip to the pencil in order to suspend the strip over the water in the beaker. Make sure the ink does not touch the water-only the bottom of the filter paper should touch the water.

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After about 5 minutes, hang the chromatogram on the side of the table to dry. This can then be taped to the attached worksheet if you choose to use it.

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Attached is a great worksheet that can prompt students as they move around the room comparing chromatograms.

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Set-up for this culminating activity is relatively basic. You'll need 3 suspect water soluble pens of the same color but different brands.

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and
When u draw the thin line make sure to use a pencil because it is not soluble, if a pen is used, the ink from the pen would be dissolved as it is soluble.