[ajax0604]

I have done an experiment in the past where the components in pen ink were separated by paper chromatography. The solvent was water in that case. I was wondering how the components separate when both the cellulose-water stationary phase and the mobile phase are both (equally?) polar as they were for the experiment. If the solvent had been non-polar like hexane, it makes sense that more polar components will tend to adsorb and move slower while non-polar components will move faster but I can't get my head around the other situation.