How do eucalyptus’s tannins interact with metal supports in mixed-media figurative works?
Eucalyptus tannins, natural polyphenolic compounds, play a unique role in mixed-media figurative art when combined with metal supports. These tannins undergo complex chemical reactions with metals like iron or copper, often creating distinctive patinas or corrosion effects that enhance the artwork’s visual depth. The interaction depends on factors such as tannin concentration, metal type, and environmental conditions. In iron-based supports, tannins form stable complexes, yielding rich brown or black hues, while copper may develop verdigris-like tones. Artists leverage these reactions intentionally, though uncontrolled oxidation can compromise structural integrity. Proper sealing techniques are essential to preserve both aesthetic and functional qualities in tannin-metal mixed-media works.
