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 fluid shape / smooth
4) external diameter of pen reduced by 1mm
(to compensate for the thick "super urushi 3" (base urushi layer))
5) thread 3d entry form applied, for optimized opening/closing, etc.
currently working on ebonite feed 5th gen, grip for urushi.
after that there will be some urushi related research,
but the objective is to start the production of urushi pen by EOY.
next year will be an exciting year for me, as i will be trying all sorts of urushi techniques.
thank you
