A Multivariate Methodological Workflow for the Analysis of FTIR Chemical Mapping Applied on Historic Paint Stratigraphies

Figure 10

Sample BC1—(a) PC45 score plot: cluster highlighted in red indicates the objects points localised within layer 4 (white dots in (b)) and cluster highlighted in green indicates the objects in layer 1 (white dots in (c)); (b and c) PC5 score maps; (d) average spectral profile extracted from layer 4; (e) average spectral profile extracted from layer 1.

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