Blue inks are a weakness of mine. I'm always searching for something that's a little different and interesting compared to the ones I've already tried.
JetPens recently started carrying small trial size bottles of many Diamine inks, and I've been trying those out pretty frequently.
Asa Blue is one of those inks, and it's probably one you've heard of before. This is one of those standard blues that gets recommended quite a bit. Even though I've known about it since I first started using fountain pens, I'm only now just getting around to trying it.
In this case, better late than never.
Asa Blue is a deep, rich blue. I'd call it a royal blue, and it lives up to the name much better than Kaweco's version of the color. Calling it navy might be too much, since navy is closer to blue-black in most cases. Either way, this is a standard blue that looks fantastic and fits in professional environments with no problem. This ink won't turn heads because of its stand-out color, but it might for the small amount of shading it exhibits.
I think the best way to describe this color is to compare it to most blue gel ink pens that you can buy. It's a standard blue, and it looks fantastic. And, like I said earlier, this is a deep, dark blue, but I wouldn't classify it as a blue-black.
Like other Diamine inks I've tried recently, it behaves admirably in my pens. Feathering is non-existant, show-through is minimal, and there's a pleasant level of shading evident in some strokes. It's a smooth, well-lubicrated ink that works well in dry, small-nibbed pens, but also doesn't over-saturate the page in a broader nib. It behaves just as you'd expect a Diamine ink to behave, and that's a compliment.
The shading in this ink is subtle. It's not flamboyant like Kon-peki, Ancient Copper, or Rouge Hematite, but you notice it in the strokes after the ink has settled on the page. There's just enough variation in the color that you can tell a fountain pen created the line. For an office setting, you can't go wrong with properties like that. It looks professional, but it's also gorgeous instead of bland.
I've been really happy so far with the Diamine inks I've tried. They behave well, clean out of the pen easily, never have issues starting or skipping, and have great color and saturation. With a deep blue, I'm not expecting a lot of shading, but the small hints evident in Asa are a real pleasure to notice when writing.
If you're interested in dark blues that behave well, this is a swell place to start.
(JetPens provided this product at no charge to The Pen Addict for review purposes.)