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● R&D121

Dodecagon cigar symmetry PEEK (Extreme Durability Test) Today i performed destructive durability test of the dodecagon symmetry peek. I was always wondering about the limits of the PEEK material. So, with the spare B grade parts, I performed a simple durability test. This is the test footage i used a regular metal hammer (the type used for driving nail). for the floor protection, I used a thick piece of wood. I am not sure if you can tell the amount .. 2024. 2. 28.
M800 nib compatible ebonite feeder developed M800 nib compatible ebonite feeder has been developed. this feed is only compatible with grip sections developed for ebonite feeder. following has been adjusted to fit M800 feed properly: 1. feed length 2. air channel adjusted to match heart hole position 3. nib groove amount adjusted 4. nib groove position and length adjusted next feed to work on is for Sailor 21K. 2024. 2. 28.
Omas nib compatible ebonite feeder developed Omas nib compatible ebonite feeder has been developed. this feed is only compatible with grip sections developed for ebonite feeder. following has been adjusted to fit aurora feed properly: 1. feed length 2. air channel adjusted to match heart hole position 3. nib groove amount adjusted 4. nib groove position and length adjusted next feed to work on is for Sailor 21K. 2024. 2. 26.
Duofold Centennial Ebonite feed development unnecessary Today I found out that Centennial nib will fit perfectly into previously developed Bock/Jowo #6 ebonite feeder. therefore a separate ebonite feed development for centennial is unnecessary. this will help speed up the ebonite feed development process. Also, I found out if i modify previously developed Aurora feeder, following nibs will be compatible: M800, Sailor 21K, Omas. in this case, a separa.. 2024. 2. 26.
Aurora nib compatible ebonite feeder developed Aurora nib compatible ebonite feeder has been developed. this feed is only compatible with specially designed grip section. following has been adjusted to fit aurora feed properly: 1. feed length 2. air channel adjusted to match heart hole position 3. nib groove amount adjusted 4. nib groove position and length adjusted next feed to work on is for Omas 2024. 2. 25.
Pilot 743 nib compatible ebonite feeder developed Pilot 743 nib compatible ebonite feeder has been developed. this feed is only compatible with specially designed grip section. after completing the 742 feeder, i went on to continue working for the 743 feeder. when developing the 742 feeder, I studied the intricate form of the pilot nib root form. so working on 743 was much easier, thanks to the experience. surprisingly, 742 and 743's nib root f.. 2024. 2. 23.
Pilot 742 nib compatible ebonite feeder developed Pilot 742 nib compatible ebonite feeder has been developed. this feed is only compatible with specially designed grip section. pilot nib is different from other brands because of its special nib root design. compared to others, the pilot nib root has bended form. this special form is the reason for high difficulty of developing ebonite feeder for it. but this time, i was determined to make a per.. 2024. 2. 22.
#3776 century nib compatible ebonite feeder 5g v3 developed #3776 century nib compatible ebonite feeder 5g v3 has been developed. this feed is only compatible with specifically designed grip section only. original century feed design is too thin @ tail area. so production and durability is disadvantageous 5g v3 ebonite feed design is very robust, and structurally/functionally same level as modern plastic feeders. with continuous research, overall quality.. 2024. 2. 20.
Ebonite Feed 5G V3 developed (BOCK/JOWO #6) Ebonite Feed 5G V3 has been developed following has been upgraded (compared to previous version) 1. more flow (If you like typical wetness, V2 is recommended) 2. a bit better overall stability 3. high ink feedrate stable 4. faster ink cleaning speed ebonite feed for bock/jowo has been completed compatible ebonite feeder for the following will be produced as well: jowo/bock(completed) pilot 742 p.. 2024. 2. 10.
New nacre types ready for research initiation so far i've used black pearl nacre and white pearl nacre (1mm thickness). i've achieve some success so far, and still working on mastering urushi part. different urushi technique is required for this special type of deep nacre inlay. this time i am challenging the deep inlay with new types of nacre: 1. iridescent Turbo Marmoratus nacre 2. mexican abalone nacre usually these nacre types are only .. 2024. 2. 6.
Eureka Asymmetry Micro Prototyping... asymmetry micro's barrel & cap maximum thickness will be 12.4mm so, it is a slim design. when it comes to a slim fountain pen, component durability is very important. this is because when maximum thickness is thinner than usual, all the component's wall thickness will be thinner as well. ◆ to maximize durability i decided to choose several key design points: 1. converter-less, eye-dropper type i.. 2024. 2. 3.
Simple Urushi Durability Test (Video) This is a simple urushi durability test of super urushi 2 (cured for 6 months) pen: platinum #3776 urushi: Super urushi 2 (single layer coated) https://www.youtube.com/watch?v=YhOVgBWUo0M&ab_channel=EurekaFountainPen 2024. 1. 18.
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.