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Heritage Science
Fig. 5 | Heritage Science

Fig. 5

From: The use of infrared spectroscopy and chemometrics to investigate deterioration in vegetable tanned leather: potential applications in heritage science

Fig. 5

A, B PLS scores plots (A) of the full spectrum analysis, showing changes between control and degraded samples across Component 2 and subtle differences between pH3 and pH5 samples across Component 4. Component 4 loadings (B) show the peaks in the FTIR spectrum which are different between pH3 and pH5 samples. And between control and degraded samples across PC3. C, D PLS scores plots (C) of the analysis of the 800–1800 cm−1 region, showing changes between degraded and control samples across Components 1 and 2. Component 1 loadings (D) show the FTIR peaks responsible for this distinction between control and degraded samples

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