In-situ fluorimetry: A powerful non-invasive diagnostic technique for natural dyes used in artefacts: Part II. Identification of ORCEIN (cas 1400-62-0) and indigo in Renaissance tapestries
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Add time:09/07/2019 Source:sciencedirect.com
In this paper, three Renaissance tapestries depicting scenes painted by Raffaello Sanzio, conserved at the Vatican Museum, were investigated using in-situ UV–Visible fluorimetric measurements. The results show that this technique is suitable for the detection of natural organic colorants used for dyeing the threads woven in these tapestries. The emission signals detected on red–purple colours were assigned to the colorant ORCEIN (cas 1400-62-0) and those on different nuances of blue and green colours to indigo by comparison with data from reference laboratory samples. The assignments were supported by chromatographic experiments carried out on threads taken from the back side of the tapestry in the same points analysed by spectrofluorimentry.
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