TWSBI has been around for a while as a pen brand, but they recently branched out into inks as well. Their first inks are a set of 6, which can be purchased together or individually. I purchased my set of inks from Lemur Ink.
The inks come in a nice box, but it’s made of cardboard and it needs the paper band to keep it closed.
The bottles are 18ml glass with red plastic lids.
Left to right: Pink, Orange, Prairie Green, Emerald Green, Sky Blue, Royal Purple.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Water resistance: Low
Feathering: Low-there was a little bit of feathering in the flex nib.
Show through: Medium
On Staples 24 lb copy paper there was lots of feathering in every nib size as well as bleeding, so I would not recommend these inks for cheap paper.
Pink is similar to both Sailor Ink Studios 130 and Sailor Jentle Sakura-Mori. Orange is close to Diamine Sunset. Prairie Green is darker than Diamine Jade Green but warmer than Monteverde Key Lime Pie. Emerald Green is cooler than Colorverse Arabella but warmer than Diamine Cool Green. Sky Blue is similar to Taccia Sora Sky Blue. Royal Purple is similar to Taccia Murasaki Purple.
I used a Lochby Lined Blank A5 notebook (Tomoe River 68gsm). All of the inks had a wetter than average flow, almost a bit thin.
Overall, I enjoyed these inks. The ink is a bit thin, which makes it flow a bit wet, but I prefer wet inks anyway. The colors are nice, but Pink is light, too light in the smaller nibs. I would reserve Pink for broad nibs, but the others are dark enough for all nib sizes.
Disclaimer: I purchased these inks myself, and all photos and opinions are my own. This page does not contain affiliate links, and is not sponsored in any way.