John, the 0.025mm depth is correct! Also, earlier in the thread I stated the "background" had to be engraved or machined to make the letters proud. Well, yesterday I got more information on how the system works, and in my opinion...it's the screwiest system I've ever seen! So the lettering is actually engraved to the 0.025mm depth. The steel plate has to be polished and NO burrs after the engraving. The ink well has magnetics in it with a ceramic ring on the outside. The magnets hold the ceramic ring tight to the steel plate then the ink is filled inside the well. The vessel is moved over the engraving to fill the lettering with ink then moved back. The ceramic ring wipes the ink off the plate leaving only ink in the engraving for the rubber pad to pick up and transfer to the mask. I've seen it work in videos and it appears to work well. Just don't ask me to clean up the mess when you lift the vessel and spill the ink all over the machine!