Noodler's Kung Te-Cheng was named after the 77th lineal descendent of Confucius, Kung Te-cheng. It is a bullet proof and eternal ink, reverse-engineered from remnants of ancient inkstones used by early Chinese royalty during the time of Confucius to re-create royal indigo ink. This ink was originally released as a 4.5 ounce eyedropper bottle, and came with a free Noodler's Charlie eyedropper fountain pen. Recently the ink was re-released in a 3 ounce bottle without the free pen. It is worth noting that this is one of Noodler's more expensive inks. I purchased my sample of ink from Vanness Pens.
Kung Te-Cheng is a deep purple. In some lighting it looks more blue and sometimes more purple. I think it leans more toward purple in most circumstances.
Large ink swabs-in most cases they bleed a little bit onto the other side of the paper, but this one not only bled through the page it was on, but three other pages as well.
I promise these ink drops are dry, but they still give the appearance of being wet. This is an ink that looks different on every paper. On Rhodia it looks a bit lighter and dusky, on Tomoe River it looks darker and more intense, so the color is really paper dependent.
Dry time: 5 seconds-really fast compared to most inks
Water resistance: High-the ink did not budge when soaked with water.
Feathering: Medium-It didn't feather at all on Tomoe River, it did in some nib sizes on Rhodia, but it feathered in every nib size on Leuchtturm. I would not recommend using this ink on Leuchtturm, just not a good mix.
Show through: Medium
On 20 pound copy paper every nib size showed some feathering, and some bleeding in the flex nib. It looks lighter and dusky like it does on Rhodia.
Since I had heard some stories about this ink permanently staining some pens, I went with a cheaper pen. I used a medium Pilot Metropolitan on Tomoe River paper. The ink is very wet.
I did have issues with nib creep in all of the pens I used this ink in. Even after two minutes of use ink crept up. The ink is very hard to clean out-I think if I left the ink in too long it would have stained them.
Overall, I think this ink has the possibility of being harmful to pens because of staining and nib creep, so I would only use it in inexpensive pens. I don't think I would leave it in a pen longer than 2 weeks either, just to be careful. This is a fast drying permanent purple, so if that's your thing give it a try, but it's not an ink I think I would ever need.
Disclaimer: I purchased this ink myself and all photos and opinions are my own. There are no affiliate links on this page.