Pilot Iroshizuku - Kon-peki (Deep Blue) Ink

Iroshizuku Kon-peki (Deep Blue) is a bright medium-blue fountain pen ink. It's one of those colors that's a business-friendly blue, but has a lot of character when you look at bit closer. It's a happy, optimistic, bright blue that reminds of looking at a clear blue sky from a high altitude. It has medium shading and a fast dry time, about 15 seconds.

(Personal Bias Alert: this was one of the first full bottles of fountain pen ink I purchased, so I have a nostalgic love for it.)

Pilot's Iroshizuku line of fountain pen inks are the gold standard for a reason. They're well-behaved, wet-writing, generally quick-drying (<20 seconds), and come in an assortment of stunning colors. Because of how Iroshizuku inks tend to be, they can often be some of the most reliable inks to give you a great writing experience with dry-writing pens (think Japanese <Fine> and <Extra-Fine> nibs).

The only place I'm careful with them is in vintage sac-filling or celluloid pens: Iroshizuku inks can be quite alkaline, which can harm these sensitive vintage materials. See my guide on vintage-safe fountain pen inks for more information.