The Mermaid nun again. With the same copper plate used for the first etching print, an experiment trial of aquatint technique was tried. Three different layers of varnish were used, with the copper plate being “bitted” by acid in the intervals, Finally, blue ink was spread on the copper plate and the print was made.

This technique allowed in this case three diferent tonalities of blue ink to be printed. It is possible to do more, if one has the patience to repeat the varnish layers and acid exposures.