Analysis reveals unique pigments in Swiss banknotes, including organic and metallic compounds, suggesting advanced counterfeiting protection.
Swiss banknotes use innovative and resistant pigments to achieve rich colors and protect against counterfeiting. The yellow color of the 10-franc banknote is due to arylide yellow, a non-toxic organic pigment with excellent resistance. The red 20-franc banknote uses synthetic iron oxide and metallic pigments of aluminum and bronze, replacing the previously used toxic cinnabar. The green 50-franc banknote contains chromium oxide, a hard and refractory pigment. The blue 100-franc banknote uses phthalocyanine, a stable organic compound with unique optical properties. In addition to its technological advantages, each banknote carries a symbolic message: time, creativity, nature and knowledge – expressed through hands holding objects with deep meaning.
No takes yet. Share an insight, caveat, or question.
Nikolova et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: