Two months ago I received my first bottle of Noodler’s Black “bulletproof” ink. The no nonsense bottle was filled to the brim, but from there my experiences with this ink were not trouble-free.
I used the ink in two different pens I both deep cleaned before filling them up with Noodler’s Black:
A traditional Indian jumbo sized ebonite eye dropper pen fitted with an Ambitious 40 mm long № 12 nib.
A pen fitted with a German JoWo EF #6 nib unit and a Schmidt K5 converter.
I found my bottle of Noodler’s Black to contain a black writing fluid that has a surface tension that causes it to stubbornly adhere or "stick" against the inside of the Schmidt K5 reservoir.
For my contemporary German technology pen I used a common solution for this problem by adding a 2.5 mm diameter 316 stainless steel bearing ball, to mechanically promote free movement of the contained ink and ink/air exchange during writing.
The solution for making the Indian eyedropper write without introducing the rattling sound of an ink agitator was not easy nor elegant. After the initial lines, just after priming the feed, the pen simply refused to write further. That unpleasantly surprised me, as paired with other “dry” inks this eyedropper always provided a generous ink flow. The pen has a traditional feed made of ebonite (hard rubber). Ebonite has good hydrophilic properties. This makes ink (and other watery substances) travel well through the ink channel in a fountain pen feed. The traditional 6.35 mm (¼ in) diameter feed is about 51 mm (2 in) long and features an ink channel that dwarfs the channels used in modern plastic feeds. These oversized ink channels are a remnant from a time when “dry” iron gall ink and ink thirsty flex nibs were in widespread use.
I had to add 0.5 ml of a homemade dish washing soap solution (1 soap drop diluted in 100 ml of water) into the 4 ml ink reservoir to make the eyedropper write as it should. Adding such a surfactant solution will chemically promote free movement of the contained ink and ink/air exchange during writing.
The ink is a saturated black and permanent. I was not able to remove it from paper, but after using it for two months on a daily basis I cannot regard my bottle of Noodler’s Black as an easy to use ink. As it comes from a small manufacturer maybe I received a bottle from a fluke batch.
Edited by Fuellerfuehrerschein, 06 July 2017 - 07:25.