I could be wrong, but I think the Newton Eastman with Montblanc Irish Green ink holds the record for longest time to write dry without a refill. This is mainly due to it’s huge 5 ml capacity. It’s also a pen that doesn’t travel well, so it’s homebound which does limit its use.
The Newton Eastman is a custom fountain pen by Shawn Newton which was built to use vintage Esterbrook nibs that are interchangeable. The pen started with the #2314-F Fine Stub when it was inked on November 2nd of last year. A month later I swapped it for the #2442 which is also a fine stub nib. I had planned to continue swapping nibs every month or so, but this one remained until the pen went dry on June 12th. I liked it.
As expected, the pen has a petulant streak to it. There’s a lot of ink in there, which switches to a lot of air as the pen is used. Plus, these are vintage nibs that were never intended to have so much ink trying to gush through them. While the amount may vary between specific nibs, the ink drips into the cap if it’s bouncing around in my bag. Or rolls off my desk. Or falls off my pen stand. Or any number of other causes. At first I was constantly cleaning out the cap as the splatter in that shiny clear acrylic bothered me. But eventually I grew tired of dealing with it and eventually grew to even like it. My experience with Montblanc Irish Green gave me the confidence that staining wouldn’t be a problem.
The Eastman also has a tendency to burp (drip ink from the nib) while writing once the the ink level dropped to about 3/4 full. This was mostly controllable by uncapping the pen then wrapping my hand around the barrel to warm it up before using the pen. But as the ink level dropped to about 1/4 the burping became more frequent and I had to watch for any ink accumulation on the nib and wipe it off before it dripped or repeat the warming process to let air out as I wrote.
Technically, I didn’t write the pen dry. There was a page or two of ink left but the burping became a real problem once the ink level didn’t even reach the barrel so I flushed the pen.
Despite its petulance I really enjoy using the Eastman. The pen is large but light. There’s no metal (well, just the steel nib), there’s not even a converter to add weight. The large pen is comfortable in my hand and I can use it for extended writing sessions without getting fatigued.
The pen was easy to clean despite being inked over seven months. The only ink that remained after a quick pass under running water was the ink that had worked it’s way into the cap & barrel threads. A quick bath in the ultrasonic cleaner and a q-tip got the ink out of the threads with little effort.
The Newton Eastman will get a bit of a break. I have 11 pens recently inked so there’s a lot of ink I need to run through. Adding another 5 ml would overwhelm me. Montblanc Irish Green has been a favorite green ink for a long time, although it has some recent competition so it may be awhile before it returns to a pen.