Replacing my 400NN obb,

[Bo Bo Olson]

4 hours ago, stoen said:

With due respect, this is only partly so. The other part depends on the ink flow adjustment, a micromechanical matching issue I’m essentially acquainted with, but still don’t fully understand. It has to do with capillary flow, air pressure variation and adhesion depending on:

 

- feed construction (post WWII feeds in a 100N are drier than the pre-war ones, they have more elaborate compensation chambers)

- feed cleanliness and form (often used, slightly warped feeds are sometimes getting service-installed, without having priorly been “rectified” by gentle heat and ultrasound cleaned).

- nib/feed mating (a process being thoroughly described in some other threads).

 

An ideal pen lays down only as much or as little ink as needed, doesn’t run dry and easily “recovers” back to  “normal flow”, after tine spread thick line.

I can sit there and say that's a forest...Stoen tells us what sort of trees are in it.

A most knowledgeable and respected poster.

With a hell of a great collection....an enviable cubed, collection.

 

And it helps to set the nib exactly in the section, on the  feed. Mauricio..a superflex expert..., said that part was real fiddly.

 

I sent two pens off to Francis, that I thought just semi-flex, they came back Wet Noodles, in Francis fiddled right and made two perfect matches.

There is a world of difference in flex between semi-flex and Wet Noodle.

[stoen]

On 11/1/2024 at 1:31 PM, Bo Bo Olson said:

A most knowledgeable and respected poster

Thank you for your kind and most polite (also, much likely, undeserved) words, @Bo Bo Olson.

I only wish I knew more and also more exactly, more in detail, so I could share it with this Forum.

🙂

Here’s a short writing sample of my green 400 OB. It’s a very nice, exciting, yet smooth writer, with remarkable line width variation depending on writing angle, and it’s not as scarce as OBB:

It has approximatly the same line width variation as my 1949 Montblanc 142G OBB.

Hope this can help.

🙂