I used the bamboo stick again. Self cut, out of a deceased pot plant.
I am using a technique that Kiah Kiean used. A friend had a workshop with him in Chicago.
Kiah pours some ink in a small glass jar, and adds some textile (like cotton bandage) to it.
It helps regulating the amount of ink that you take out of the jar.
Still, you have to find out how to work with it: at first clogs of inks get onto the paper, so you always have to figure out which parts can use blotches. Then you draw the greyish lines before the babmboo runs out of ink.
It takes a lot of exercising but is very rewarding.