Inktend / Ink library / Adonis Butterfly Blue
Anderillium
Adonis Butterfly Blue
Small-batch natural-history inks organized into Avian, Cephalopod, Lepidopteran, and Ichthyoformes series, each color named for a real creature.
Specs
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 Anderillium
Anderillium is a small family-run American ink maker producing small-batch fountain pen inks inspired by the natural world. Each color is named for a real animal and grouped into themed series such as the Avian, Cephalopod, Lepidopteran, and Ichthyoformes collections, sold in distinctive 1.5 oz bottles. The inks are formulated in-house and have become favorites among nature-loving pen users for their evocative, well-researched palette.
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.