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● R&D139

Developing eureka compatible ebonite feeds for various nibs in addition to current jowo/bock #6 and platinum #3776 ebonite feeds, i will be developing compatible ebonite feed for following nibs: 1. jowo/bock #6 (steel/gold) --- developed 2. platinum #3776 --- developed 3. Aurora 14/18k 4. Omas 5. pilot 742 6. pilot 743 7. M600 8. M800 (not in the picture) 9. Duofold Centennial 10. Duofold International (not in the picture) 11. Mont Blanc 146 (not in the .. 2024. 1. 17.
Super Urushi 4 has been developed Today I announce the completed development of Super Urushi 4. Urushi work has been a personal research of mine since 2019. For 5 years, I've been doing urushi research focusing mainly on durability and aesthetics. above all, urushi durability has been the main objective. when i started doing urushi on fountain pens, I didn't know much and I was told that urushi is very strong material. so I just.. 2024. 1. 6.
ink spurt resistance test (5th gen ebonite feeder) the 5th gen ebonite feeder was based on improving/modifying the 4th gen ebonite feed design. although, it ended up becoming a completely different feeder from 4th gen. the 4th gen ebonite feeder had good ink spurt resistance. so i just assumed 5th gen will be at least similar. however, just assuming something works becuase it is a predecessor of previous gen doesn't guarantee its performance. so.. 2023. 12. 27.
Dodecagon cigar symmetry PEEK completed Dodecagon cigar symmetry PEEK has been completed ! below photos are prior to finishing process. - compatible with all symmetry components created this year. - barrel/cap angle will allign perfectly when closed - logo applied to captop area - grip is 24 faceted shaped - compatible with 5th gen ebonite feeder - pilot con70 / con40 ink converter can be used - for nib (bock plain blasted / two-tone .. 2023. 12. 19.
Super durability Raden (Nacre inlay type), Stripe(Wave) barrel and cap completed Super durability Raden (Nacre inlay type), Stripe(Wave) barrel and cap has been completed. the design theme is Stripe(Wave) one set is in black pearl nacre the other is white pearl nacre even though it is black pearl nacre, there are white parts, also, for whilte pearl there are yellow parts quite interesting characteristics... also, white color is mostly iridescent the black and yellow parts al.. 2023. 12. 18.
Peek Dodecagon cigar symmetry Barrel & Cap completed After completing the Ultem dodecagon cigar symmetry fountain pen, i wanted to complete in peek material as well. however, due to new version of urushi pen development and advanced technique development for Raden, much time has passed. so, since middle of last week, i started working on the peek one. currently barrel and cap is completed and i will soon work on the grip section. the grip section .. 2023. 12. 17.
Super durability type Raden (Nacre inlay) Researching... Today is the first time I tried my Super durability type Raden (Nacre inlay) Raden type: - Super durability Raden (Nacre inlay) - Black Pearl Nacre 1.1mm thickness - Super precision slicing - Design: Stripe - "Wave" The Design below is Stripe "Wave" the spacing between Nacre stipes are very accurate. also continuously accurate all across 360 degrees. The thick nacre has been inlayed directly int.. 2023. 12. 14.
Super precise slicing of thick type mother-of-pearl achieved precise slicing of thick type of mother-of-pearl achieved. traditional slicing of nacre is done using 0.2~0.3mm thickness. in order to achieve high durability, i used 1~2.5mm thickness nacre. slicing this into thin, accurate long pieces is very difficult. following is the typical precision of this research. length 30~40mm, thickness 1mm, width accuracy = 0.02mm length 60mm, thickness 2.5mm, widt.. 2023. 12. 12.
Solid Ebonite Penrest Development Initiated a couple of years ago, i developed cast-type penrest. this time, i started developing solid ebonite penrest. the result of this project will look something like the picture below. main materials can be seen below. since color rods are limited in number, black ebonite will be produced in larger quantities. the development is at initial stage, so i am getting equipments ready, in the next posting .. 2023. 11. 18.
Super-durability type Raden research initiated I've always wanted to do Raden (techinique using mother of pearl) for urushi pens. however, due to its dubious durability i stopped myself from doing so. But I really do love the look of mother of pearl. above all it's a true beauty formed 100% naturally. therefore, i did not totally give up researching for super-durability raden technique. and today i announce the new beggining of its developme.. 2023. 11. 16.
Symmetry for Urushi developed (v10) Symmetry for Urushi has been developed (v10) these are the components: barrel / cap / grip / ebonite feed (5th gen) + Con-70/40, or eyedropper this design is suitable for coating urushi, and enables good durability of urushi with considerable focus on durability / strength developing this model has been one of my primary objectives, ever since i relocated the new factory before the relocation, i.. 2023. 11. 5.
Grip section for 5th gen ebonite feed completed Grip section for 5th gen ebonite feed completed It is compatible with all eureka models can be used in 3 ways: with Con-70, Con-40, Eyedropper For Con-70, only Asymmetry / dodecagon cigar symmery (ultem) are compatible, other previous models' barrel will not fit Con-70 (unless you personally expand the internal size) The following has been updated: 1) compatible with 5th gen Ebonite feed 2) comp.. 2023. 11. 1.
Platinum nib compatible ebonite feed developed (eureka grip required) Platinum nib compatible ebonite feed has been developed this requires specially designed grip section overall feed design is similar to Bock compatible ebonite feed except: 1) nib groove 2) tail size 3) frontal slant angle after making certain amount of these, i will move onto making ebonite grip section for urushi coating after that i will make some ebonite grip section for regular models these.. 2023. 10. 23.
nib surface treatment study This is my recent nib surface treatment study I recently acquired plain Bock nibs from Germany. which, to my surprise when magnified, the polishing didn't satisfy me. so i started a little study. in the future i am going to do following research: 1) nib engraving on plain bock/jowo nib 2) solid 14~18K gold sheet (in certain shape) micro welding to stainless nib 3) gold (various types), rhodium c.. 2023. 10. 21.
5th gen ebonite feed v2 developed Following has been changed: 1) frontal top portion thickness changed 2) external rib increased by 3 3) internal groove (top) increased by 3 A total of 159 cutting process used to complete this feed left: v2, right: v1 2023. 10. 18.
ebonite feed (5G) + CON-70 fitting test The following have been observed during the fit test: 1) compared to 4th gen ebonite feed, which used a screw type ink converter, the con-70 increased ink capacity by 3~4 times. 2) when filling the ink, i noticed i have to dip deeper into to the ink bottle to achieve stable ink fill. compared to 4th gen, the dip amount increased. i think this is due to the quick suction of the ink by Con-70, as .. 2023. 10. 17.
5th Gen Ebonite Feed developed Finally completed the 5th gen ebonite feed the following have been upgraded: 1) super precision attained with ebonite material 2) more complex internal (inside grip) structure 3) equal level of complexity as plastic feed 4) high precision fit of given nib, through 3D nib groove machining 5) high level of fit, even without heat setting 6) Con-70 converter compatible 7) stable eye dropper performa.. 2023. 10. 17.
B & C for Urushi (new version) completed hello guys, new update for the new version of urushi pen development the following has been improved, compared to previous version: 1) internal & external thread is pretty much perfect now 2) the end point of internal & external thread is "escape type" previous type had a groove for thread tool escaping, which reduced strength/durability at that groove spot. 3) barrel and cap end contour more fl.. 2023. 10. 10.
Dodecagon Cigar Symmetry (Ultem) Developed Today i completed the grip section for the dodecagon cigar symmetry (ultem) now, the project is complete. for the grip section, i wanted to do dodecagon as well. unfortunately, it was uncomfortable to write with, due to the large spacing of the angles. so i tried 24, 36 angles. overall 24 angle was best. the following has been aligned: 1) barrel, cap, grip angle aligned 2) bock nib unit, when in.. 2023. 10. 3.
Dodecagon Symmetry "Cap" completed This time i completed the dodecagon symmetry ultem (cigar type). in the last post, i presented the dodecagon ultem barrel, which was quite hard to do. however, this time the difficulty was at least 2x. it was especially difficult for following reasons: 1. when closed the barrel and cap angle must line up accurately 2. there's three different ways the tripple thread engages when it closes. even w.. 2023. 9. 27.
Asymmetry Diamond Dodecagon Cap developed Asymmetry Diamond Dodecagon Cap developed This was a bit ambitious project for me, because i have not ventured into multi-facet machining. the required precision and requirement was quite high, and took months of hard work to master. the multi-facet comprises of 408 small triangles. depending on the view angle, the reflection pattern will change. it requires great precision for all 408 triangles.. 2023. 9. 20.
Dodecagon Symmetry "Cigar" Barrel completed So far, i could only make linear (rod) dodecagon. This was due to precision issues. the level of precision required is quite high, even for Rod dodecagon, for "Cigar" or Taper dodecagon even more precision is required. thanks to recent research, i successfully developed "Cigar" dodecagon barrel. This was my first time making parts from Ultem material (Germany, high quality) since it has a bit le.. 2023. 9. 16.
eureka asymmetry diamond dodecagon cap fountainpen has been developed (protoype) below is prototype pen, actual production pen will be different production will begin soon! 2023. 9. 12.
Diamond & Ruby machining process developed For a while, i've been researching for multi-facet precision machining. This is a highly complex process requiring utmost precision. ideally 0.01mm precision is required, however, this is very difficult because all the inaccuracies add up. so far, i've achieved 0.04mm precision. i think 0.1mm precision is okay for sale. now i am trying to achieve 0.01mm precision, although this is gonna take muc.. 2023. 9. 10.
Asymmetry dodecagon cap developed 2023. 7. 28.
new Dodecagon cap developed (ebonite material) new dodecagon cap has been developed in ebonite material.captop logo & side engravings applied.below sample has not been polished 2023. 7. 27.
Prototype gen5 ebonite feed ink fill test (Con-70) I created a very basic gen 5 prototype feed, for ink fill test only airchannel is applied (some omitted) all other features not applied (rib, ink channel, etc.) this is the side view of the test feed air channel from converter is connected to the hole the hole is drilled to the center of the feed a long thin hole is drilled all the way to the aforementioned hole drilling thin-long hole is not ea.. 2023. 6. 21.
Prototype drawing of 5th gen Ebonite Feed (research log 6/18/23) i will be developing my 5th gen ebonite feed. based on years of experience on my 4th gen ebonite feed, i have found some areas i can improve upon. 1. first consideration is feed diameter usually #6 nibs have 6mm diameter feed. in order to make ebonite feeder more stably with greater durability i've chosen 6.5mm, same as the 4th gen predecessor. the nib is designed for 6mm feed, but 0.5mm diamete.. 2023. 6. 18.
New exotic materials to try... These are Super engineering plastics very high quality from germany, very expensive... looking forward to trying out these materials, although it will take much time... PEEK, Black PEEK, PEEK (glass fiber 40%) PEEK (carbon fiber 30%), PEEK (graphite-teflon), PEEK blue (medical grade), Ulterm (galssfiber / natural) 2023. 6. 17.
"Arc Grip" type has been developed "Arc" grip type has been developed in PEEK material. so far, 3 types of grip designs are completed in PEEK material. 1. normal (taper) type 2. super grip type 3. arc type since an adequate amount of research is completed in grip section, i will move onto further developing other parts of the pen. 2023. 5. 25.