Hank,
I agree, advance it beyond those before, ditch the cardboard and bubble gum. But if you can't get the ink to dry in a consistant manner, there is no use advancing the mechanism.
You could print out some nice capacitive switches and keypads with the flexiable pcb material.
I might try this first with an unmodified printer. This way I can get a feel for the ink.
P.S. If we could determine if the same ink used in "Sharpie" pens would function in an epson print head. This ink dries fast and is etch resistant.
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