Last week I wrote a post on TWSBI Blue-Black, a workhorse fountain pen ink that shows significant water-resistance to the point where I would consider the ink basically waterproof. Following that post, I received several questions about how the other TWSBI inks compared, so I decided to do a quick test.
Basically, the “test” was exactly what I did with the TWSBI Blue-Black: I dunked a sheet of Rhodia paper containing a writing sample of all five standard colors in a glass of water for five minutes. Admittedly, this is a pretty “extreme” test, so the effects are probably more akin to your notebook going through the washing machine than to a few raindrops or a spilled drink that’s quickly wiped away. Here are the results:
As you can see, TWSBI Blue-Black clearly performed the best, followed by TWSBI Black, which also showed significant water-resistance. TWSBI Midnight Blue also remained quite legible. Unsurprisingly, Sapphire Blue and Red showed little water-resistance, though both did remain legible to the point where you would probably be able to recover most of your writing.
Overall, I’m very happy with how the TWSBI Inks performed, and the Blue-Black, Midnight Blue, and Black inks will likely find their way into my permanent work rotation. I carry all five of these inks in the Curated Shop, and as I mentioned in the prior post, they’re priced competitively at $15.99 for a 70ml glass bottle. We also carry the full range of other TWSBI products, including the TWSBI Diamond 580 ALR in “Prussian Blue,” as well as the new TWSBI ECO Lilac, which we recently added to our offerings!
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