PCB resist: Direct inkjet printing

[Screaming_Rabbit]

... but high enough to withstand soldering...

I think it doesn't even have to withstand a higher temperature than the soldering tin. I lately soldered a PCB which was "printed" with tin by this silk-screen printing technique. - The printed tin was melting but the result was surprisingly good. The circuit trace just shrunk a little bit at the soldering points but it stayed perfectly intact.

Greets, Roger