● R&D Log174 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 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.. 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.. 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) "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. "Super Grip" type has been developed "Super Grip" type has been developed in PEEK material 54 individual micro "protrusions" are precision-machined individually. these bulges fits between finger print ridges, enhancing anti-slip properties. different boundary lengths were tried for choosing best overall aesthetics. in the end i chose the one in the last picture. it seems quite adequate, not too excessive. in terms of performance, i.. Eureka Symmetry Model (PEEK material) new symmetry model has been successfully developed in PEEK material This is a fully precision-machined pen from solid peek rods. we only use the PEEK material imported from Germany (high quality) PEEK is a hyper-performance plastic (or super engineering plastic), that has following characteristics: 1) superb chemical resistance 2) high temperature resistance (max 260C) 3) superb strength, wear r.. Eureka Symmetry Model developed new symmetry model has been developedMaterial: ebonite, special plastics etc.design not suitable for urushi coating (a different model will be created adequate for urushi coating in the future) below photo shows a sample of this model (unpolished state, a further polishing process will be applied) comparison to prior symmetry modeloverall thickness and length reduced(cap size reduced, below phot.. Eureka ebonite feed 4G v4 (developed) while researching the adaptation for music nib, original feed seemed to lack the feeding capability. through research, the following has been discovered. by adding addtional top rib structure, the flow of feed increased by 2~3x easily. *the round grooves are for dual heart hole of music nib. from now on all eureka custom fountain pens will get this adaptation. for the owners of previous gen eure.. ebonite Captop for #3776 century developed (Round) ebonite Captop for #3776 century developed (Flat) with the development of ebonite captop, now it is possible to do urushi coating on this type of pen, after proper surface treatment. captop ring has been removed to gurantee better urushi fit / finish compared to original captop. original captop is attached to the cap via a plastic rod that extends from the inside of the captop in the photo below, it only shows the broken area where the rod used.. The first prototype This is the first eureka prototype that started eureka fountain pen. recently, of the two ever created, i sent one to one of my avid user. the last one will be kept inside display, and will not be for sale. Relocating Factory... Production will be very limited for months Chingin technique developed Chingin technique has been developed. pure silver powder 99.9%, with urushi as binder. eureka chinkin v2 (test results) hello guys :) today i finished one of the designs with eureka chinkin v2 technique. still a long way to go, and much failures. however, improvements are gradually taking place. this time i made a cap with yellow tamenuri, with blossom grooves (filled with silver urushi) unlike the usual chinkin, the grooves are almost completely filled, so the surface is flat. a lot of filling is required, so pu.. black widow tamenuri urushi developed hello guys, this is the fountainpen researcher. today i completed a unique type of urushi that i recently tried. i call it black widow tamenuri urushi technique the pattern beneath the clear top urushi layer reminds me of a continual pattern of black widow spider' pattern. on top of the pattern, a clear top urushi has been applied. this is one of the most difficult urushi teniques i use. it is e.. initial chaos urushi technique done again! today i just finished one of my initial chaos urushi pens. initial chaos urushi is technically difficult, so i've been looking other ways to replicate the same design. however, of numerous techniques to mimic the looks, none of them worked... so, i am at a loss to what to do. i guess i have to revive the devilsh technique. currently, i am working on a way to make the process a bit easier... hope.. chaos urushi type 5 (v5) developed chaos urushi type 5 (v5) has been developed. type 5 was developed based on type 0 (initial chaos / v0) urushi technique. the following has been improved (compared to initial chaos urushi): - stronger durability (inital type was also durable, but this is simply stronger) - more vivid color possible - stabilized chaos control - production capacity improved - various finishing types can be integrat.. Eureka ebonite feed 4G v3 *This feed was developed about a couple of weeks ago, so all the shipped pens recently are equipped with this feed. Upgraded from Eureka ebonite feed 4G v2, upgraded features of the 4G v3: - more slanted cut towards the front - air channel modded for maximum flow while achieving high stability - ink channel and air channel machined deeper - frontal area higher precision, allowing perfect horizon.. reduced type Chaos urushi developed so far, chaos urushi technique showed interesting result. the patterns and colors were nothing i've ever seen before. also, the durability of the urushi far surpassed solid color / tamenuri urushi. this durability factor has been proven dozens of times, when i did sanding work on them. although some users enjoy its super uniqueness, others suggested it was a bit overwhelming for their taste. the.. Aurora nib Retipping original state: EF nib with approximately 1/2 worn iridium point. Repair objective: MF (ball 0.8mm) nib with stub style point. -all works went smoothly. -a new type of point smoothing used. it used to take 15~30min to make perfect writing nib. however, with upgraded type of smoothing technique, perfect griding is achieved in 1~3 minutes. less iridium is worn down, as well as perfectly scratch fr.. eureka Au-Ag nib (4G v3) 4G v3 auag nib has been developed upgrades are as follows: -nib frontal area form changed (flatter type) -nib point position lowered to near center line area (writing precision improved, writing feel improved) -nib cutting precision improved -nib welding precision improved -nib weight heavier than v2 (0.9g); v3 nib weight = 1 gram other brands: 146: 0.7g / 149: 0.9~1g / duofold: 0.9g / century: .. eureka Au-Ag nib (4G v2) nib engraving is deeper and more defined than 4G v1. nib engraving can be diversified from now on (currently 3 variants) below are some examples, more design types will be made (may be notified later) below photos are magnified at least 70~100x original size (pc view) they are handmade nibs, so some differences exist. the differences can be seen under big magnification, they are difficult to see.. Perfect balance achieved (nib point smoothing) It's been almost 3 years, since i started the fountain pen research. there were mountains of obstacles that prevented me from creating the perfect pen. one of the most difficult has been, achieving the perfect nib point smoothing(polishing). there were numerous attempts and methods that i used to gradually improve the writing feel. until this day, all methods didn't achieve the perfect writing f.. Ebonite feed (4G v2) so far, eureka ebonite feed had conservative ink feeding amount. this was to prevent over flow accidents, and achieve high stability. previous attempts to increase ink flow while achieving high stability were full of repeated failures. however, today i succeeded increasing ink flow by 40~50%, while achieving high stability. from now on all eureka ebonite feeds are going to be set this way, allow.. "149 size" nib improved through research through research, previously made "149" type nib has been updated. this is the overall design of the pen (finish: polished chaos texture urushi) the texture has natural feel to it. the texture on the grip section especially improves grip feel. compared to previous version, the engraving is deeper. visibility of the engraving has been much improved. also, different kinds of nib engraving are poss.. Texture Chaos Urushi Developed previously, a revolutionary chaos urushi technique was developed. chaos urushi is stronger than tamenuri urushi, which was satisfying. however, it still did not meet my requirement. therefore, even stronger urushi technique was needed. with much effort, texture chaos urushi has been realized. this urushi style is beyond anything i've ever created or seen. it's got high level of urushi durability.. (4G V1) "149" sized nib , (4G V1) ebonite feed developed As there is no longer restriction of size, thanks to the adoption of auag material, a bigger "149" sized auag nib has been developed (4th generation version 1 nib) this development was much postponed due to difficulty in developing a completely different nib. external size of the nib is 26~27mm, weight: 0.9g overall nib thickness increased by 66% thanks to this major update, infinite selection o.. Brass name plate for the urushi pen rest (under development) as the chaos urushi technique has been completed, all eureka fountainpens will have discrete naming individually from now on. therefore, a method was needed to help buyers remember the pen's special name. a brass plate with engraving on it was the perfect solution, all the while achieving a antique look. wooden pen rest will be coated with thicker type of urushi (below is just a thin type urushi.. Reply Function Fixed. 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