Rand Huebsch - Embossing
To make an embossing plate, the metal sheet, with both exposed and protected areas, is kept in the acid bath for many hours. The resulting metal mold is then covered with a sheet of paper and passed under the heavy roller of an etching press, to push the paper into the recesses of the plate that were carved by the acid. This creates a paper bas-relief that evokes the carvings in stone or ivory of the Mayans, Egyptians, and Medieval artists.
To see an article about the embossing technique: Click here