* More details will be continually updated to the current version of the manual in the future.
◆ Basic Detail Regarding the Nib
1) Material: Titanium alloy Grade 23 ( = Grade 5 ELI )
"Extra low interstitial" (ELI) refers to a grade of titanium alloy, specifically Ti-6Al-4V (Grade 5) ELI, where "ELI" stands for "Extra Low Interstitials". This designation indicates a version of the standard Ti-6Al-4V alloy with significantly reduced levels of interstitial elements like oxygen, nitrogen, and carbon.
The reduced interstitial content results in improved ductility, fracture toughness, and biocompatibility, making it suitable for demanding applications.
2) Material Origin: Germany or USA (will be specified on the each pen on sale)
3) Nib size: Currently only B sized nib has been developed.
in the future F, M sizes will be developed, but not anytime soon.
4) titanium alloy hardness: Moh 6~6.5
* typical "iridium-point" hardness: about Moh 6.5~7.5. Really hard ones suspected to be Moh 7.5~8
* iridium = 6.5 / osmium = 7 / tungsten = 7.5 / hardened steel = 7~8 / tungsten carbide = 9 / diamond = 10
5) this nib will spring back even if a large force is applied. the material has great returning properties, like a spring. Way more springy than typical gold or steel nibs that I experience.
* a strong writing force is not recommend for this type of nib, because the tip is less hard than typical nib points.
6) this nib is 100% precision-machined from a solid titanium rod
7) nib fixation method: thread-type. Easy disassembly, cleaning, and maintenence.
8) O-ring seal applied for the frontal grip area, so ink will not seap out between grip frontal hole area.
9) Nib - Feed assembly method: angular fixation + thread locking (precision within 0.05mm)
10) nib hole precision within 0.05mm
11) Ultem feeder precision (outer diameter) = ±0.01mm
◆ Maximum effective nib point length = 5mm
1) because the titanium point is less hard than typical nib point alloys, the titanium point design is much elongated to maximize the nib longevity.
2) multiple regrind of the nib is possible by the user.
3) the user can grind the nib thickness and shape, if needed.
* it is easier to grind than typical nib point alloys. so regrinding the nib point is easier.
◆ Feeder design optimized to maximize the effective nib point length (at 45 degrees).
Robust feeder design, so accidental breakage while disassembly is unlikely.
◆ The nib point is designed in such a way, so that the writing thickness will be even across all range of the nib point length.
* initially the thickness will be thin because the end of the point is rounded.
* as the round point wears down, the writing thickness will increase (unless a regrind is done).
