Rotring Isograph Technical Pen, 0.25 mm

I used the Koh-i-noor brand for years, and went back to dip pens because they were so unreliable. The Alvin pens are superior, but very hard to find. Microns, in my experience, are ridiculously expensive, and often run out of ink during the first or second use. People probably use them because the other brand of tech pen popular in the U.S. is way too much trouble. I tried one of these, and now have four. They are easy to use, clean, and, as long as Rotring ink is used, they do not clog, even after several days of lying unused. The Koh-i-noor pens seemed to clog if I looked at them too hard. I have the .2, .25, .3, and .4. I DO NOT recommend using regular ink, even good ink, that is not designed for these pens. My favorite black ink is Dr. Ph. Martin's Bombay ink, but I DO NOT use it in these pens. It WILL clog them, even though the label indicates it can be used in technical pens. Other than being held hostage by the Rotring ink, I cannot think of a downside to using these instruments. Great product.

Precisely what we needed.

These pen make an excellent fine line for pen and ink work. They are durable, being refillable cuts cost and they rarely if ever clog.

Delivered on time. Works as it should.

Anyone who uses an isograph, or radiograph, knows how easily they clog up and die. I use them for illustration. I've tried replacing them with Micron and similar pens, but they don't match the quality line you get with an isograph. They're expensive and I've probably spent over a thousand dollars on them over the years, but they're great when they work. They require a lot of maintenance and cleaning,

Rotring pens are AMAZING. I'm actually replacing all of my Koh-i-noor technical pens to Rotring after my first purchase of a .10 mm a few months ago. The ink flow is SO smooth, no "skips" as you're drawing, and you don't have to fight it after you get the initial ink flow (which, getting the ink flowing is super simple too!). These pens are amazing, and are a must have for any illustrator, artist, graphic designer, etc. who heavily uses technical pens in their work.

The Rotring isograph is great, only one issue with the .25 specifically.The nib does not write.Solution: YouTube rotring isograph not working and it’s a bit of a pain to get the issue resolved.Quality control definitely lacking when it comes to this size. Lol

Very fine line, very easy to refill. Took just a second.