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. 2015 Sep 1;9(5):054101. doi: 10.1063/1.4928298

FIG. 6.

FIG. 6.

Photos of a color matrix printed 1 mm apart with four solutions on a silanized glass. The solutions are red (top left), blue (top right), yellow (bottom left), and black (bottom right) dye dissolved in DMSO (scale bar: 1 mm).