Fig. 8From: Novel nannofossils extraction methods from paintings, coupled with GC–MS for provenance determination and binder analysisThe solution becomes orange when A ME1 and B ME2 are in contact with linseed oil. After some time, a density separation (L1 low density to L4 higher density) of the materials is visible with colour variations (L1: dark orange, L2: lighter orange, L3: whitish, L4: orange pale; all four are opaque solutions)Back to article page