Fig. 5From: 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 objectsFTIR spectra for a PF ashtray ATR clamped and handheld, b PF ashtray ER and KKT, c MF canister ATR clamped and handheld, d MF canister ER and KKT, e CSF buckle ATR clamped and handheld, f CSF buckle ER and KKTBack to article page