Charles Barth

Charles Barth

Cedar Rapids, IA
El Sando sin Mascara, Intaglio
16 x12

Plate making
Bevel the edges of 2 zinc plates (for red & blue), 1 plexiglass plate (for yellow)
Degrease the plates with alcohol.
Cover one plate (key plate, blue) with asphaltum.
Draw image with etching needle and bite in nitric acid (4 to 1) for 20 minutes.
Ink, with black ink, print and transfer ink while fresh to the second zinc plate (red).
Bite the second plate for 5 seconds in nitric acid to establish the image.
Build up images on both zinc plates with asphaltum, aquatint for various tones and bite in acid for various times depending on the amount of color density that is desired on
each plate.
Use plexiglass for yellow (yellow ink oxidizes and turns brown on zinc).
Place plexiglass over the key plate (blue) and use an etching needle (drypoint technique) to develop the image.

Printing
Print the plates in this order: yellow, red, blue.
When the plates are printed the result will be a spectrum of colors.