Fig. 1From: Evaluating three water-based systems and one organic solvent for the removal of dammar varnish from artificially aged oil paint samplesQualitative assessments of degrees of pigment pickup with corresponding numerical values. Left column: brown earth pigment on white cotton swab tips; right column: lead white pigment on black cotton swab tips. Microscopy images are in visible light, scale bar: 2000 µm, magnification: × 30Back to article page