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Chem - CuCO3
RNY INKS is one of the 713 brands in Inktend's built-in ink catalog.
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Paper & pairing
Blues and navies are the most broadly "safe" fountain pen colors: legible, professional, and unlikely to raise eyebrows in an office. This ink will behave predictably on most fountain-pen-friendly paper. Cheap, highly absorbent paper (standard copier paper) will dull any ink's saturation and can cause feathering or bleed-through with wetter nibs.
About RNY INKS
RNY INKS is a small independent fountain pen ink maker whose hand-mixed colours (including series such as Basic, Throwaway, Tea and Metallurgy) are catalogued by ink collectors. Beyond its inks the maker is best known in the hobby for publishing "RNY INKS' Guide to Fountain Pen Ink Making", a freely circulated multi-chapter primer on dye-based, pigment and iron gall ink formulation. The brand has no significant retail presence and its inks circulate mostly through enthusiast trading.
Storing and using the bottle
Bottled fountain pen ink has an effectively long shelf life when kept capped and out of direct sunlight: most inks remain usable for years. The main risk isn't the ink spoiling, it's a pen sitting inked and unused for weeks: that's what causes clogs, not the ink's age.
Frequently asked questions
Similar shades By colour distance
Color shown is a close digital approximation of a typical swatch, not a calibrated color match.