Fig. 16From: Evaluation of novel cleaning systems on mock-ups of unvarnished oil paint and chalk-glue ground within the Munch Aula Paintings ProjectMicrograph (×5 and ×20 objective lenses) of M2-G mock-up before (BC) and after (AC) cleaning with CO2-snow indicate moderate soiling removal (rating 3) and redeposition of soiling particle (arrow)Back to article page