rOtringIsograph Technical Drawing Pen | 0.80 mm | Refillable Fineliner Pen

This is a great pen.It draws smoothly and reliably. Takes India Ink which is waterproof and permanent. Way cheaper and sustainable to use a refillable pen than keep buying disposable pens. I bought a 250ml bottle of ink; way cheaper than the tiny ones. The steel nib will last forever. I use it most days. But if I leave it for a while, a good shake and the ink flows like a dream. I had been using cheaper brands, which were fine for a while, and then clogged and stopped working, even after extensive cleaning and faffing about. Grrr factor 10/10 after several months of use. As an artist and not a technical draughtsperson, I really rate these pens. Mine is a 0.6 nib. Can't vouch for the reliability of the finer nibs.However, it is too easy to over-tighten the grey nib holding section against the handle / barrel. Mine has a hairline crack, allowing the barrel to rotate a bit and be annoying. But it does not affect the drawing function, or ink flow, just the handling of the barrel. Still useable, but would like a better quality plastic at that point in the design. I have not been heavy handed with it. It was just a bit weak there on the thread.Having said which, it is far superior to the cheaper brands. I wasted money buying several cheapos, thinking I had simply bought a rogue pen initially. Not so. The working parts were just not as good as Rotring. Invest in the best.

I’m fond of these isograph pens anyway, but the .13 is superb for details and adding smooth stippled values.I haven’t found it prone to clogging, but it does need the odd gentle wrist flick if you’re doing dot work with it at the same angle for extended periods.My only criticism of it is the same one I have of all isograph and rapid-o-graph pens — that the pen body itself is made of the world’s flimsiest plastic and you can break them just by slightly over tightening the cap when you screw it back on.

I have read a few of the negative reviews on here and feel that many people do not understand what these pens are intended for, I am an architect who has been using Isographs for 15 years and will continue to do so. Mine are used for working drawings, general line work and commenting on design files.- These pens are fragile and need maintenance to be kept in good working order. If your pen is blocked, clean it.- The barrel will crack if you are over tightening them. They always have been like this, no change in my experience from the German to Indian manufactured products in this regard.- Isographs are designed to be used at 90 degrees to the paper/medium. If this is alien to you, change your pen to a felt tip, don’t expect the tool to adapt to you. If you have broken the tip of the pen it is due to improper use.- The feel of the pen while drawing is not “smooth” it is not designed to be so do not expect a gold nib fountain pen writing experience. They are designed to provide a consistent crisp line, feedback from the media below will be picked up, especially with the thinner line weights.- They can leak, most probably they will leak in all honesty but sometimes you will find one that doesn’t – cherish it and do not hand it out!If these writing tools are used as they are supposed to for the intended purpose (line work) they will last a life time, I made a purchase of a second 0.4 to have two inked up in different colours at once, not because of any need to replace. In my experience these are the best technical drawing pens available, highly recommended.

The build quality is outdated. For the price you pay, i expected better quality materials. Nothing wrong with plastic, just that the barrel connector feels ready to crack and very flimsy. Otherwise, as a drawing tool, it works great, but not great if you angle the nib. I am pleased with it, just needs build quality.

Not worth the money, when you stop drawing for 2 seconds it's inconsistent on whether the next stroke will produce ink or not, even if it happens once every 60 strokes it's often enough to loose confidence over every stroke. The only way to mitigate it is to hold the pen at exactly 90 degrees to the page at all times which is an awful way to hold a pen. The pen itself feels like its made of cheap plastic, the lid barely fits on the back of the pen. It can't handle any amount of speed when drawing lines and the drawing feel is scratchy and unpleasant.I would be able to adjust to all the minor gripes if it actually made lines every time I put the pen to paper but it cant manage this basic function. Just save yourself time and money and buy a pack of fineliners.

If you're in need of a pen with a really thin tip - this might be the one for you. It doesn't come with any ink or means to fill it; but it's kind of assumed that you own all this stuff. I had ink, but no filly thing, so I just used a syringe I had lying around (a measuring syringe - I'm not a smackhead!)If you've got hands spades and arms like a stevedore, you may find the tip a little delicate - I had to ease right up on my heavyhandedness to adjust for it, but I love it now. The body on mine has cracked, but I've dropped it a few times, so that's probably on me.

Made in Germany came from India rubbish no advise on ink to use, nib broke on first use.Will buy again just not from this company should try British,would be easier to return

The way this pen lays down ink is incredibly satisfying. Lines are precise and crisp. My only regret is, I didn't purchase the entire set. Which I shall invest in, shortly.