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Heritage Science
Fig. 11 | Heritage Science

Fig. 11

From: Electrochemical assessment of pigments-binding medium interactions in oil paint deterioration: a case study on indigo and Prussian blue

Fig. 11

Square wave voltammograms of microparticulate deposits of a indigo, b isatin, and submicrosamples extracted from c unaltered and d altered layers of the Sant Francesc de Paula paint, all attached to graphite bar immersed into air-saturated 0.25 M HAc/NaAc aqueous buffer at pH 4.75. Potential scan initiated at 1.05 V in the negative direction, potential step increment 4 mV, square wave amplitude 25 mV, frequency 5 Hz

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