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Non-invasive identification of polymers in cultural heritage collections: evaluation, optimisation and application of portable FTIR (ATR and external reflectance) spectroscopy to three-dimensional polymer-based objects

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Academic year: 2020

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Figure

Fig. 1 Case study objects with polymer components from back canister, PE bottle lid, ABS ‘Zip’ Polaroid camera body, PMMA knife handle, PA light meter screen, CA sunglasses, CSF buckle, polyester left: PS jelly mould, lamp with PVC cable, PUR ring tray padding, PP Tupperware™ goblet, PF ashtray, ‘EE44’ Polaroid PC flash screen, MF buttons, CN box
Table 2 Case study object characteristics
Fig. 2 SNR (P–P) plotted against number of co-added scans for polymer reference sheets: a ATR clamped, b ER sample accessories
Fig. 3 SNR (P–P) plotted against number of co-added scans for objects: a ATR clamped, b ATR handheld and c ER sample accessories
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