Fig. 18From: Evaluation of novel cleaning systems on mock-ups of unvarnished oil paint and chalk-glue ground within the Munch Aula Paintings ProjectSEM image (~ 500×) of a M2-Pu mock-up before (BC) and after (AC) cleaning with CO2-snow indicates less surface soiling than before cleaning, but also widening of a crevice in the paintBack to article page