Hey, while we’re on the subject of ink I have a story to relate. This is about my high school physics teacher. Before he was a physics teacher - way, way back in ancient times, like the 1970s, he used to work for IBM, as a problem solver kinda guy. Now, this was before fancy printers and everything, so IBM had these ginormous machines that wrote their checks. Forty feet long, and with a pressurized ink system. So it’s 3 in the morning, and my future teacher gets called in because one of these machines has stopped working. IBM has lots of checks to write, so he goes in at 3 am - in his three piece suit and tie, because it’s IBM, and white lab coat.
This particular machine was positioned such that there was a 2 foot space in between it and the wall. He figured there was a bubble or something in the ink system. So he goes around behind the machine with a small cloth in his hand and crouches down to the screw cap. He’ll just relieve a bit of the pressure and it’ll be fine. So he unscrews it a bit. Nothing happens. He unscrews a bit more. Still nothing. He unscrews more, and the cap comes off in his hand.
“Uh oh.”
When he stands up and looks behind him, there is an outline of his shape on the wall. He is soaked through to the skin in ink. Through his lab coat, through his expensive suit. He’s got racoon eyes when he takes off his glasses. Turns out the problem was something else entirely.
Oops.