Fig. 24From: Evaluation of novel cleaning systems on mock-ups of unvarnished oil paint and chalk-glue ground within the Munch Aula Paintings ProjectSEM images (~ 500×) of a M2-Pd mock-up before (BC) and after (AC) cleaning with PU sponge indicate moderate soiling removal (rating 3), but also directional lines possibly from the mechanical actionBack to article page