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In this work, we present a complete Raman investigation of a class of compounds that has not received great attention yet, the red naphthol‐based azo dyes. We selected a group of red azo dyes often used by artists in inks and lake pigments: acid red 1, acid red 14, acid red 18, acid red 26, acid red 27, and acid red 73. A set of reference materials was studied by dispersive Raman, FT‐Raman, and surface‐enhanced...
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