Fig. 13

FTIR-2D imaging of the black Golden MSA paint mock-up, showing an area cleaned with Nanorestore Gel^® Peggy 5 and cleared with Nanorestore Gel^® Peggy 5 hydrogel with exposure time: 1 min (a, b), and control soiled (c, d) and unsoiled areas (e, f). For each area, the images beside the visible map show the corresponding 2D FTIR maps, where the intensity of the negative band at 1670 cm⁻¹ (C=O stretching of polyvinylpyrrolidone, marked with an asterisk) was imaged. All maps are 700 × 700 µm². The corresponding FTIR spectra are shown in the right panel; each spectrum relates to a single pixel (5 × 5 µm²) of the corresponding 2D imaging map