text: we have a green mixture.  we paper chromatographied the mixture, and the resulting color was blue and yellow.. (on the filter strip).  does that mean that green ink is present?  is there a way to make the ink come off the filter paper, by dissolving in water or something?  or, can we perform tests on the actual filter paper?  (because the ink is on it).  please help! there is no green component of the ink, it's made up of the two colours that separated, blue and yellow.  you can cut the bands out of the filter paper and dissolve it in 95% ethanol, but the resulting solution will be much weaker than the original ink, unless you use a rotovap to condense the ink compound.