Not sure if that's bubble jet or inkjet, but I think inkjets are very very cool!

For a deep dive of inkjets, there's a conference that posts talks: https://youtube.com/@theijc

And, a shallower dive of the complexities of inks is the great "engineerguy": https://youtu.be/-DckWNwE7R4

I initiated some small talk with a guy at a security conference once. Turned out he was an ink DRM expert at one of the big companies.

Interesting convo but I didn’t invite him to drinks later that evening.