The finished plate is then immersed in an 4:1 HCL-HNO3 bath so it's under a 1/4 inch of acid. (The strings are polypropylene to help remove the plate.)

After 3o minutes, the lines were deep enough and we removed the plate, rinsed with water, wash with a baking soda solution, and rinsed again. Lines are about 2 mm deep.



The ground is then removed with laquor thinner and the plate sanded with 600 grit paper to remove any junk.

and finally ready to print

Hopefully, Noah will print tomorrow and remember to bring home a photo of it.

UPDATE - 12 June 2010: We finally got to see the final print. He did both black on white paper and white on dark blue. The black on white is shown below.