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Column chromatography is one of the most common methods of protein purification. Like many of the techniques on this site, it is as much an art form as a science. Proteins vary hugely in their properties, and the different types of column chromatography allow you to exploit those differences.
Qualitative filter paper is also suitable for doing paper chromatography. An example of this can be seen if you click on the adjacent Technical Tab. Filter Paper-Ink Chromatography If you cut filter paper into a rectangular shape you can use it to do paper chromatography. Any of our sizes will do but most experiments can be done with the 70, 90 or 110mm sizes.