This frosted glass bottle contains 70ml of TWSBI Blue-Black fountain pen ink, and comes with a conical insert for easy pen filling. This color is a modern iron gall and highly water-resistant.
The top of the TWSBI Diamond 50 Inkwell is also interchangeable with the top of these 70ml ink bottles, for another easy way to fill compatible pens.
Type: Bottled Ink
Bottle Material: Glass
Bottle Opening Diameter: 20.2mm (0.80in)
Fast Drying: No
Freeze Resistant: No
Iron Gall: No
Water Resistant: No
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