Conservation scientists in Iran have utilized a revolutionary non-invasive technique called Atomic-Pulse Spectroscopy to recover the exact chemical composition of the paints used on the Darius the Great bas-reliefs at Bisotun. The technology allowed researchers to 'see' through layers of natural mineral deposits to identify a vivid palette of Egyptian blue, cinnabar red, and yellow ochre that originally adorned the monumental carvings. This marks the first time the specific binder materials—derived from local plant resins—have been identified.
This breakthrough has significant implications for the future of heritage restoration, as it allows for the creation of digital color reconstructions that are historically accurate. The research team plans to use this data to develop a protective nanocoating that mimics the original resin binders, effectively shielding the reliefs from modern atmospheric pollution while maintaining their chemical integrity. The project is a collaboration between the Iranian Cultural Heritage Organization and international conservation institutes.