This is what the entry from the Zecchi site looks like to help in ordering: “ Ultramarine Green. Chemical composition: Blend of Solfuro di Sodio and other pigments(Series: 9) .” Here is our best guess at the equivalent in Italian. This is from the Italian portion of the site: “ VERDE OLTREMARE. Composizione chimica: Miscela di Solfuro di Sodio e altri pigmenti.”