Experiments With Flex

[Detman101]

On 7/21/2021 at 12:13 PM, duckbillclinton said:

Calliarts ego 3 pen, flex modded Jinhao #6 nib, heavily modded feed.

 

The experiment of such nib design verifies,

 

1. If breath hole sizing affects ink film stability -- It does! Smaller breath hole or no hole at all is highly recommended!

2. If long cut slit is needed for wide strokes -- it helps a LOT, but for less aggressive wide strokes, it is not a must.

3. If modded feed surface can help to maintain ink film (bubble) at the breath hole -- it certainly helps.

 

All my theories turned out to be correct.  It writes wonderfully, except the tip needs lots grinding and smoothing.  Also I grinded down the sides too much near the breath hole, the nib is way too soft.  For daily use, I have to add an overfeed to make it stiffer.

 

Oh wow, how did you create the "Overfeed"? I believe this would make my Pen-Realm custom flex-nib functional again if it would stiffen and keep the nib tines together and not allow them to flex so widely.

 

-DM-

[Detman101]

On 7/25/2021 at 3:42 AM, duckbillclinton said:

Whenever you mess up a flex nib mod, you can ALMOST always save it by adding an overfeed to guarantee ink film's stability.  That's why I play with different metal foils (thin plates) to make "luxury" overfeed for my flex writers.

 

I use 316L stainless steel foil a lot (0.1mm thickness), but here are some very precious metal foils I obtained recently, they are all metals from the element table with good corrosion resistance.

 

I just couldn't believe how awesome cold rolled Molybdenum, Niobium, and Tantalum turn out to be (all the same 0.1mm thickness).  These 3 metal in pure form, after cold work, have a small amount of flexibility.  Each metal has its own unique silverish color.  It's super NICE!

 

Titanium foil in pure form has beautiful color, but even cold roll and further hand tool cold work couldn't save it.  It's too soft, not enough flexibility to be any use of an overfeed.  Same applies to Nickel, pure Nickel foil is even softer than pure Titanium, so it's also no use.

 

Titanium alloy in 6AI-4V, however, is a beauty, the cold rolled foil of same 0.1mm thickness, plays wonder.  Wow!  It's very springy and flexy, nice.

 

(On the photo, I labelled Niobium and Tantalum with the wrong order, it should be the other way around.  Tantalum has cold silver color, a bit towards light blue grey silver.  Niobium has warm silver color, a bit towards light brown silver.)

Okay, now I understand what material to use!!
THANK YOU!!

 

-DM-

[Bo Bo Olson]

I still go for the old Vintage nibbed pens.....4/5ths because of pure ignorance of modern affordable flex.

 

I got my Second Weak Kneed Wet Noodle on a pen today. A big Morton nib on an Osmia 76 medium large pen.

The  second mdl 76 Omsia is a maxi-semi-flex Supra in the case. The middle two left of the  Sonnet.

A Wet Noodle 1927?/9 Duofold Lucky Curve Senior Deluxe. Seems to be another Wet Noodle....and by Parker.

 

If I had any common sense, I'd go modern, if all I was doing was scribbling instead of drooling all over the paper.