The artistic approach of Eichens relied on a command of line and stipple. He produced plates after Titian and Raphael, along with contemporary artists like Ary Scheffer. In his engraving of Titian's daughter, Lavinia, he used varied hatching to suggest the different textures of fabric and skin. His work is defined by a level of clarity that was difficult to achieve with the tools of the period. He avoided the heavy, dark shadows common in earlier eras, preferring a clean and balanced tonal range.

Modern collectors appreciate these prints for their graphic quality and historical character. The monochrome nature of his engravings allows the composition and form to remain the primary focus. These pieces provide a sophisticated alternative to colourful reproductions. They suit minimalist or traditional spaces where collectors favour fine detail and classical subject matter. Eichens represents a period when the engraver was a translator of genius, bringing the galleries of Europe into the private home.