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Beautiful and the perfect size to fill a pen a few times. Great way to buy a variety of colors.
Deanna · March 27, 2026
Very little feathering indeed!
I've been using my TWSBI Eco every day for seven years and this might be one of the best waterproof inks I've put in my pen. The color is a little boring (I like bright, vibrant blues) but it is a real pleasure to write with! Most of the paper I write on is low quality (copier handouts, spiral notebooks, legal pads) and this does really well with those. As a marine scientist, the waterproof aspect is important but most other inks bleed too much.
Matthew · February 20, 2023
X-Feather Blue
Ever-so-slightly wetter than X-Feather Black (but not a wet ink). Overall a great performer, even on terrible office paper. Will definitely put in permanent rotation for everyday use!
Anonymous · January 12, 2023




