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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: Twin-chain polymer networks loaded with nanostructured fluids for the selective removal of a non-original varnish from Picasso’s “L’Atelier” at the Peggy Guggenheim Collection, Venice

Fig. 4

The cleaning of Pablo Picasso, The Studio, 1928, oil and black crayon on canvas, 161.6 × 129.9 cm, Peggy Guggenheim Collection, Venice (The Solomon R. Guggenheim Foundation, New York). a The TC-PN hydrogel is loaded with the o/w NSF (24 h immersion). b Gel sheets loaded with the NSF are gently squeezed with blotting paper to remove the fluid excess from their surface, and (c) cut to desired shape and size. d The gel is applied onto the painted surface. e Gentle mechanical action with a dry cotton swab allows the removal of the swollen/softened varnish and wax. f Rinsing step: a water-loaded gel is shortly applied on the same spot to remove possible residues of the NSF. At bottom, center panel and related black boxed details show the cleaning of white and red areas. On the right, the painting during the cleaning: the cleaned lighter areas can be easily distinguished from the darker uncleaned areas at the top. ©Succession Picasso, by SIAE 2020

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