Inktend / Ink library / Ruby
Ruby
An Australian ink maker known for saturated, often sheening colors and frequent small-batch releases.
Paper & pairing
Reds and pinks show the most dramatic shading of any color family — expect real variation between the edges and center of each letter. 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 Robert Oster
An Australian ink maker known for saturated, frequently sheening small-batch colors.
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.