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→Key Stage 4
#Suspend the [[chromatography]] paper in a suitable [[solvent]] just below the pencil line with most of the paper above the [[solvent]].
#Wait until the [[solvent]] stops rising up the paper.
#Remove the paper from the [[solvent]] and allow it draw a pencil line at the boundary between the dry and wet areas, then leave the paper to drycompletely.
#Use a ruler to measure the distance that the [[solvent]] has traveled up the paper.
#Use a ruler to measure the distance that the different [[dye]]s have traveled up the paper.