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Heritage Science
Fig. 6 | Heritage Science

Fig. 6

From: The identification, approaches to cleaning and removal of a lead-rich salt crust from the surface of an 18th century oil painting

Fig. 6

Dino-Lite microscope images, comparing the different cleaning approaches and their cleaning effect in visible light (top row) and UV radiation (bottom row); A Control area showing the crust; B The EDTA at pH 7.5 cleans quite uniformly; C The CA at pH 7.5 gives an uneven cleaning; D The Pemulen ® TR-2 gel at pH 7.0 cleans the crust but requires a lot of mechanical action and repeated application to reach the same level of cleaning as the EDTA

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