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PAPER CHROMATOGRAPHY<br />
Two Different Black Inks<br />
(left) Pelikan 4001 black fountain pen ink. (right) black water soluble marker.

Fphoto-14597401G-2FP.jpg

PAPER CHROMATOGRAPHY
Two Different Black Inks
(left) Pelikan 4001 black fountain pen ink. (right) black water soluble marker.

Copyright:© 1974 George Resch - Fundamental Photographs

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