Fig. 7From: Characterization of polyvinyl alcohol-borax/agarose (PVA-B/AG) double network hydrogel utilized for the cleaning of works of artFrequency sweeps at 25 °C. a Hydrogel formulations containing only PVA-B (3% and 4%), b hydrogel formulations containing 3% PVA-B and increasing concentration of AG, c, d Hydrogel formulations containing various percentages of PVA-B and AG. The standard deviations are presented as error barsBack to article page