In my ink-collecting zeal one afternoon, I bought this bottle of Sailor Jentle Blue-Black ink at the Kinokuniya book/stationery shop in Seattle’s International District for $20, which is almost (but not quite) double what I would have paid for it if I’d just stayed home and let Amazon deliver it to my door. It wasn’t even the ink that I’d gone there for; Sailor Yama Dori was my quarry for the day, but it was out of stock, and as I looked through a notebook of color swatches, this grabbed my eye.

Blue-blacks have never been my thing because most of them are just dull, desaturated dark blues. At least, the ones that I bought in cartridges as a teenager were.
But this one was different. In the sample swab that I saw, the ink appeared to be a dark, subtle blue-grey leaning towards teal. It was the subtle green influence in the color that made me jump on it.

And this is how the ink turned out. It’s a beautifully unsaturated blue-green that darkens up to a near black when put down heavily.

I immediately loaded the ink into a pen with a flex nib and started playing around with it, and I was very pleased with the variation in tones that I got, though they dried to more similar tones than I expected.

It’s a well-behaved ink: it dries quickly, and has good, medium flow. I wouldn’t call it water resistant, but it does appear that it can withstand a couple of drops of water without being completely obliterated.
I’m always satisfied when I start looking through my inks for similar tones for comparison and find that I don’t have anything that’s similar. That’s the sign of a good ink purchase, as far as I’m concerned. My Colorverse inks also appear pretty desaturated until you put them next to this Jentle (and the pink of the Anti-Matter suddenly becomes very visible).

In the end, I’d say that this ink is exactly what I expected and I’m very happy with it. It’s great for those times when I want something subtle and blue-grey rather than Baystate Blue levels of electric blue.



Hello Matthew,
Based on your investigation of this ink, I find it an attractive ink that I would buy. However I don’t see any green in it. I am looking at your ink sample on an iPad Pro. So I feel comfortable that I am getting a good color image from your monitor to mine. Just an observation from a color lover who has been in fountain pens and ink for just a little while.
Cheers,
Nanci
Hi Nanci!
Yes, this is one of the oldest reviews on my site, from back when my collection of inks consisted of about 10 bottles, so I’d probably describe things a little differently now. The color of the ink is pretty much blue, but leans just slightly to the green side of blue rather than the purple side.
If you use a screen-capture on any of the three central images and then sample the color, you’ll get something in the hue range of #7998B8, in a bunch of different values from light to dark. If you pull that up on a color wheel, you’ll see it’s just slightly to the green side… but still decidedly blue.
Take Care,
Matthew