Fig. 4From: Evaluation of novel cleaning systems on mock-ups of unvarnished oil paint and chalk-glue ground within the Munch Aula Paintings ProjectStage 1 evaluation of trials of soft particle blasting (SPB) trials on the undiluted cobalt blue paint M1 mock-ups with wheat starch, Arbocel® A and Arbocel® B. Ratings from 1 (poor) to 5 (good). Stars have been off-set (throughout the paper) for overlap visibility and this does not represent differences in ratingBack to article page