What preservation techniques are used for polychrome stone sculptures?

Polychrome stone sculptures, renowned for their vibrant colors and intricate details, require specialized preservation techniques to maintain their historical and artistic value. Key methods include:

1. Cleaning: Gentle removal of dirt, pollutants, and biological growth using soft brushes, lasers, or chemical solutions to avoid damaging the original pigments.

2. Consolidation: Strengthening fragile stone surfaces with adhesives or consolidants to prevent further deterioration.

3. Color Restoration: Retouching faded pigments with reversible materials to revive the sculpture’s original appearance while ensuring future reversibility.

4. Environmental Control: Regulating temperature, humidity, and light exposure in display or storage areas to minimize degradation.

5. Protective Coatings: Applying microcrystalline wax or synthetic resins to shield the surface from moisture and pollutants.

These techniques, often combined, help preserve polychrome sculptures for future generations while respecting their cultural significance.