Imagine holding a 19th-century Japanese print: vivid colors, a background shimmering like silver. For centuries that sparkle was a mystery, but physics now has the answer. At the Museo delle Culture in Lugano, ten precious ukiyo-e were "scanned" without contact, using infrared and ultraviolet light. It's like an X-ray for art: no needles, no sampling, just light.
The results dive into traditional chemistry. Pigments come from nature: akane (madder) for reds, suo (sappanwood) for purples, kariyasu (a grass) for yellows, and kio (orpiment) for oranges, all bound with animal glue. The star is bero-ai, Prussian blue: imported from Europe, it won over Japanese artists for its intensity and low cost, used pure or mixed for greens and purples.
The real discovery? Mica. Found in the background of one print, it is the first scientific proof of the *kirazuri* technique: mica powder sprinkled on wet paper to mimic the glitter of precious metals or snow. UV light then revealed old water damage and faded motifs, invisible maps to restore the past. Technology doesn't destroy the magic; it explains it.
