142 research outputs found
Nanofluids and chemical highly retentive hydrogels for controlled and selective removal of overpaintings and undesired graffiti from street art
One of the main problems connected to the conservation of street art is the selective removal of overlying undesired
graffiti, i.e., drawings and tags. Unfortunately, selective and controlled removal of graffiti and overpaintings from street
art is almost unachievable using traditional methodologies. Recently, the use of nanofluids confined in highly retentive
pHEMA/PVP semi-interpenetrated polymer networks was proposed. Here, we report on the selective removal of acrylic
overpaintings from a layer of acrylic paint on mortar mockups in laboratory tests. The results of the cleaning tests were
characterized by visual and photographic observation, optical microscopy, and FT-IR microreflectance investigation. It was
shown that this methodology represents a major advancement with respect to the use of nonconfined neat solvent
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