The De Atramentis ink Leonardo da Vinci in Terra di Sienna is praised as open, harmonious and shinier than Sepia; delivery via Dr. Jansen runs reliably. When cleaning a pen that contained Ochre Yellow, surprisingly neon-green water flows out — reported damages, however, do not exist; advisable is to use the colour only on converters emptied promptly and to clean immediately afterwards. With black inks starting problems are observed; blue inks flow more easily; concrete statements on red inks as particularly aggressive the forum posts could not confirm.