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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Images of magnified paper strip tips and edges (at 120 times magnification) and paper of the body of the strip and its edge (at 60 times magnification) for each of the different lissamine green brands under investigation in the physical study.