![]() Test treatments were carried out on archaeological objects: silver-plated copper alloy coins. Physical peelable gels (Agar or gellan gum) displayed more limited compatibility but were more easily applied on metallic objects. Viscous physical gels (Xanthan gum), collagen-based physical gels (nerve glue), chemical gels (Nanorestore gelsĀ®) or dispersions (polyacrylic acid, cellulose-based compound) displayed good compatibility with acid, neutral or basic solutions. First, the compatibility of these physical and chemical gels or dispersions with selected treatment solutions was checked. These gels and dispersions have been tested as a support for the treatment solutions usually used for chemical treatments of metals. ![]() In this study, several gels and dispersions were selected for use in metal treatments. Currently gels or dispersions are widely used in the restoration of paintings, graphic arts, stuccoworks and stones, but their use in metal restoration is less widespread.
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