There are thermal inkjets, different from thermal printers or piezo-inkjets. They work by electrically heating a small wire to create a steam bubble, which push

There are thermal inkjets, different from thermal printers or piezo-inkjets. They work by electrically heating a small wire to create a steam bubble, which pushes the ink out. See https://en.wikipedia.org/wiki/Inkjet_printing#Thermal_DOD https://en.wikipedia.org/wiki/Inkjet_printing#Thermal_DOD