Hey people!
At school we've been experimenting with this printing technique called "etching" (acquaforte in italian) where you basically corrode a zinc sheet with nitric acid.
I don't want to go in depht with all the steps, but you'll see them in my work :)
The black stuff Is a varnish that coats the surface and cannot be eroded by acid
Finished mould
And the final work! You archieve bold lines and deep blacks. I made the background with alcohol markers and colored pencils.