Bottle 60 ml
Birmingham Pen Co. · Keystone Formula
Birmingham Pen Co. Glassblower’s flame fountain pen ink from the Keystone Formula range.
Ink characteristics
- Range
- Keystone Formula
- Colour family
- Blue
- Reference colour
- #255875
- Properties
- 2026, 50 ml, 50ml, blue, darkslategray, darkslategrey, june, june2026, royalblue, teal
- Sheen
- Not marked
- Shimmer
- Not marked
- Shading
- Not marked
- Vintage safe
- Not marked
- Limited edition
- Not marked
- Collaboration
- Not marked
- Discontinued
- Not marked
Selected packaging
- Packaging
- Bottle
- Volume
- 60 ml
Screen colours are approximate; ink appearance varies with paper, nib and lighting.