Fig. 5From: Gellan residues on paper: quantification and implication for paper conservationGelatine-sized historical rag papers seen in visible light (top) and under UV-A radiation (bottom) after gellan or blotter poulticing, before and after accelerated ageing (21 days at 80 ℃ and 65% RH). Both poulticing methods remove discoloured products from the papers (indicated by red line) detectable under both illumination conditionsBack to article page