These five grades of cleaned sand contain no impurities to affect artwork. Use in paintings, mixed media and collage, or the finest grade on collograph plates. Before applying, mix with MM2 Impasto Medium, MM4 Gel Medium, MM6 Polymer Matt Varnish (water-based), MM7 Poly Gloss Varnish, MM28 Polymer Satin Varnish (water-based) or MM30 Matt Gel Medium. Do not make the mix too dry, though for best results add it relatively generously. Large quantities on large canvases not recommended.