My class just finished one last lab, Paper Chromatography. We started with spinach leaves then tested cabbage powder, pens, and markers. Here is a spinach leaf chromatography lab. Here is a good chromatography with pens lab. Here is a markers chromatography lab. I use qualitative filter paper. However coffee filters, especially the thick, fancy filters, work well, too. Try a 50:50 mixture of rubbing alcohol and water for plant leaves and washable markers. Compare your results with plain tap water as a solvent. The pens will require rubbing alcohol, either 70% or 90%, which are already diluted with water. Any cups will do! Take a look!
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