Initially I tried to get the raised text effect using aluminium, zinc and steel but none of them worked. I was using copper sulphate as the mordant.
sharpie marker on zinc etched in copper sulphate
Just thought I would see how they looked. I quite like the larger of these which is done on steel. I wrote the handwriting on the plates using a sharpie marker - to act as a resist. I used the same ink mix on these - its funny how different the colour looks?!