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In article <F73124AFD4114740AB4F48F9D2807C8D02E05B4C@ro-msgmbx-03>, "Gutierrez, Diane" <Diane.Gutierrez@westgroup.com> writes >Have any of the members of this list ever compared the various ink >manufacturers' products using paper chromatography? This involves putting a >premeasured drop of ink on the end of a absorbent paper strip and putting >that end in a solvent (in this case, probably water or alcohol). The colors >in the ink migrate through the paper, separating on the way to the other >end. http://wwwchem.csustan.edu/chem1002/mrsketch.htm offers a simple >method. Well I haven't compared different inks, but I did try some chromatography during the early days of the Epson x70 Orange Plague fiasco when it was discovered that the black ink turned brown as well as the cyan fading. It was suggested that the black ink was a composite of the other colours, so I made a test chromatogram with all four colours. That showed conclusively that the black ink was not a composite and hence it was not the cyan component of the black in which was causing the brown coloration. -- Kennedy Yes, Socrates himself is particularly missed; A lovely little thinker, but a bugger when he's pissed. Python Philosophers - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.