Fig. 10

Fractional contribution histograms of gradual varnish removal. A Fractional contribution histograms were created from the image data acquired during the gradual varnish removal done by solvent application using a swab without mechanical action. The top row shows three sets of histograms for each representative lifetime from the inside of the area of the image highlighted by the black line in B. The bottom row of histograms is from the outer control area, where no solvent was being applied. C, D Same as above, but done on the image data acquired during solvent application using a swab with mechanical action. All histograms were normalised to make their integrals equal to 1