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● Research and Development76

"Cross" tamenuri urushi technique developed "Cross" tamenuri urushi technique has been developed! cross type urushi technique + tamenuri finish. various patterns and colors can be done. 2021. 5. 31.
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.. 2021. 5. 31.
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.. 2021. 5. 23.
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.. 2021. 5. 18.
experimenting with patina on silver alloy nibs hello this is fountain pen researcher here, aka dovidu. today, i experimented with my AuAg nib (approximately 60~70% silver nib, with gold etc. alloying metals) initially i used sterling silver nib, which tarnished very badly. then i switched to argentium silver from england. the argentium's got a bit of germanium in the metal, which improves tarnish resistance. while argentium did perform bette.. 2021. 5. 16.
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.. 2021. 5. 14.
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.. 2021. 5. 8.
Super Urushi, Chaos Urushi (type2) Developed So far many different types of urushi has been developed: solid color, tamenuri, chaos (initial type), chaos (type 1), chaos (type 2), Super urushi currently we produce following types only: chaos (type 1), chaos (type 2), Super urushi we no longer use other types of urushi, because they are much weaker in terms of durability / wear resistance. development order is as follows: (6 being the lates.. 2021. 5. 1.
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: .. 2021. 5. 1.
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.. 2021. 4. 11.
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.. 2021. 4. 8.
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.. 2021. 4. 6.
"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.. 2021. 4. 5.
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.. 2021. 3. 29.
(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.. 2021. 3. 29.
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.. 2021. 3. 6.
Reply Function Fixed. Reply Function has been fixed. now everyone can leave replies. sincere apology for all the inconvenience 2021. 2. 21.
eureka's ultimate urushi techinique ("chaos") developed eureka's ultimate urushi techinique ("chaos") has just been developed. while realizing chaos technique, a near perfect finishing is achieved as well. infinite pattern and color scheme will unfold, from now on. 2021. 2. 19.
new types of urushi technique under development aside from traditional solid color tamenuri methods, new technique are under development the new techniques shows the limitless possibilities of the urushi laquer. the true beauty of urushi laquer is about to unfold. 2021. 2. 18.
teflon grip protector, research finished when opening and closing the pen, the grip frontal area and inner cap area inevitably cause friction. this is especially noticeable for vintage grip style designs. below is 1st gen eureka grip design, which is loved by many. however, as users continue to use it frequently, severe scratching is inevitable. this is aurora 88. grip design : vintage style much scratching and dulling is observed, @ f.. 2021. 2. 3.
parker duofold international retipping (part 2) this post is part 2 of "parker duofold international retipping" after welding, i proceeded with the slitting. this is even more difficult than welding. from the previous post, one can see the extra gold weld material @ the right tine has been equally removed. this was quite difficult process. also, from the below photo, it can be seen that the frontal part of the nib has been repolished, while n.. 2021. 2. 2.
parker duofold international retipping (part 1) this is part 1 of the parker duofold international retipping. a new phenomenon was observed, which wasn't previously noticed! this is right before welding the nib, after a bit of grinding work to remove the iridium. left tine was thicker than the right, probably due to welding/slitting error from manufacturer. from this photo, the right tight has a bit more gold material, as a result of grinding.. 2021. 1. 30.
8 urushi colors developed orange yellow mint green mandarin white (bright beige) magenta red light green 2021. 1. 8.
urushi polishing technique, much improved compared to previous technique... below figure is an estimation based on feel and observation. unfortunately, i don't have the scientific/precision equipments to do that. 1) surface smoothness improved by 2~3x (observation under microscope) -micro bumps are no longer present 2) final polishing improved by 3~4x (observation under microscope) -even the most difficult area to polish, are now equall.. 2021. 1. 6.
eureka cartridge v2.2 eureka cartridge v2.2 - sealant type changed to clear (acrylic friendly) - cleaner thread cut - thread cutting fluid type changed (acrylic friendly) 2021. 1. 1.
nib overall shape improved through personal research #1 --> not enough bending amount, thought to be an effect of "spring-back" phenomenon. #2 --> V-bending phenomenon @ skyblue dot, thought to be inevitable. so far, #1, 2 was wrongly thought to be a consequential result of bending a springy sheet material. increasing press pressure by 10x improved overall shape. especially, improving #1 was vital, because when the nib is slitted, a deformation oc.. 2020. 12. 23.
raden tamenuri challenge started! this is my first time dealing with raden tamenuri urushi technique. this is deemed to be one of the most challenging urushi works. for the shells, I decided to use smaller particles, instead of larger ones. i believe this has many advantages over larger particles. even the tiniest shell particles will be used, to provide "mechanical interlocking properties" for urushi. like concrete, cement alon.. 2020. 12. 15.
raden urushi (na-jeon) technique research raden urushi will be done within this week, research is current ongoing, to achieve a mass produceable, consistent & durable, raden urushi technique. test will be done within this week, and if things go well, its process will be applied to all currently made pieces. that includes custom b&c, as well as fountain pens. various colors of sea shells will be applied something like this, below is just.. 2020. 12. 14.
dodecagon symmetry v1.1 upgraded from v1.0: 1) design easier to urushi coat 2) end portions rounded to facilitate production 3) cleaner angle cut 4) grip shared with symmetry v9.2 5) grip front part more rounded (*vintage/aurora style grip design is prone to scratches when opening and closing cap, a unfavorable design for urushi coating) (below grip is designed to reduce scratching when opening and closing cap) 6) grip.. 2020. 12. 10.
edson & visconti nib retipping (part 2) retipping completed for: edson & visconti nib! check part1 for what it looked like before retipping work :https://eurekafp.com/257 2020. 12. 5.