we use 3 color dyes (unknown, green and either red, blue, and yellow).
-And drop those color on each piece of chromatography paper
-Put the paper into the teststube, which have already contained a small amount of water
-Wait for 20mins
Then the result may seem like the picture from below
Conclusion: Chromatography is one of the seperation that can seperate complex mixture, such as food colour from above. They are both combined with different colour and get the new one, and originally each color have different solubility, through the chromatography paper, different will stop according to their component's solubility.
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