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Hey all, I'm a bit of a lurker around here but I love checking in every so often. I am posting this around multiple sites at the moment as I am preparing to start my dissertation with the title "Computationally modelling ink filling systems to identify causes of bubble formation". This was a project I initiated myself as I wanted to be able to involve my interest in fountain pens in my work at university. Basically I am aiming to model how bubbles form in converters/feeds/pistons and even inkjet printers and to comment on their adverse effects on the performance of fountain pens/printers and solutions to this problem. I plan for it to be a fairly dynamic project so nothing is set in stone about what I am going to do, I have no idea where it will take me. I was wondering if anyone in this fantastic community has done any work in the area or know anyone who has? If so, are there any papers you would recommend for me to read or is there something in particular that you think I should attempt? Any advice is appreciated and if anyone is interested in talking to me about my project then I would be more than happy to discuss it with you. If there is a particular interest in my project then I may even be inclined to make regular blog posts on my work and findings. Thank you in advance, I really look forward to any suggestions that you have!

I bought a Lamy Joy recently, as a desk letter pen. It is a lovely pen, really just a design change from the Safari, Al Star, Vista and all those. But for some reason the converter always has a great deal of little bubbles all throughout it. It writes fine and after a little ink has been used and a few days all the bubbles are gone and it really is not a bother but I am afraid of two things; One that it may leak because something us wrong, and two that I am losing a lot of possible ink fill because of all the "inky froth". It is not a real functional bother but it is a slight concern. Anyone else have this issue? I have another Z24 in my Safari and it works just as it should. Only difference is in my Joy I am using Noodler's Bad Blue Heron (A very wonderful blue), and in my Safari I am using Noodler's Bulletproof Black. I could try to switch inks between the converters or change converters in the Joy to see if there is an intrinsic variable. Wanted to see if this is a common issue and if so we could put an answer out there in black and white for all. Good Luck!