A time-and-true test to think about how solutions and mixtures exist, these Chromatography Paper Strips from Frey Scientific are specially engineered to give best reactive performance. Whether testing with black or colored inks, this chromatography paper allows for clear, crisp separation of pigments, making them easy to read (and a much greater substitute to flimsy coffee filters). Chromatography paper strips each measures 6 L x 3/4 W inches. Sold as 50 strips per pack.