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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

From: ZnO, TiO2 and Fe3O4/Carbopol hybrid nanogels for the cleaner process of paper manuscripts from dust stains and soil remains

Fig. 4

Application and cleaning process using the high and low viscosity of nanogels; A Application of high viscosity nanogel by spatula; B, C Covering the applied high viscosity gel with polyethylene sheet; D Removing the applied layer using a spatula; E Removing the residue with a cotton swab; F, G Application of the low viscosity from nanogels using a soft brush; H Cleaning process by a cotton swab

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