Platinum Classic: Forest Black Ink teal ink Compatible with Sheaffer fountain pens

Compatible with Sheaffer fountain pens and fountain pens from other makers

Platinum’s proprietary cartridges and converter (sold separately) keep ink handling tidy

It behaves

Made in Japan

Platinum Classic: Forest Black Ink teal ink Compatible with Sheaffer fountain pensForest black is a permanent dark green ink that darkens further as it dries. This ink is waterproof, lightfast, has a "dry" but consistent flow, and dries quickly. Platinum Forest Black is a modern iron gall ink, which means its permanent (and becomes even more permanent as it darkens with time). If you leave this to dry in cheap steel nibs, it may corrode them (iron gall inks are acidic), but its perfectly safe for normal use.