[Steppes] Mushroom inks

[Elaine Crittenden via Steppes]

Just found this on Wikipedia when looking for info on puffball mushrooms (NOTE: deadly amanita looks like them at times.). 

"Puffballs were traditionally used in Tibet <https://en.wikipedia.org/wiki/Tibet> for making ink <https://en.wikipedia.org/wiki/Ink> by burning them, grinding the ash, then putting them in water and adding glue liquid and "a nye shing ma decoction", which, when pressed for a long time, made a black dark substance that was used as ink.[3]"

I checked on "nye shing ma" and the closest I could get was “black cohosh”. Anyone ever tried making puffball mushroom ink? Is it permanent enough to ID equipment?

YIS,
HL Lete Bithespring