His technique involves a rigorous application of the burin to copper plates. Faithorne avoided the haphazard scratching seen in earlier English prints. He used systematic cross-hatching to define volume and light. This approach creates a sense of three-dimensional form in his portraits of figures like Prince Rupert and Charles I. His work is identified by its crisp lines and the absence of unnecessary decorative flourishes.

Modern collectors value these prints for their historical accuracy and formal restraint. The portraits provide a direct connection to the Restoration court. Their monochrome quality allows them to fit into various decorative schemes. They provide gravitas to a room. They are historical documents and examples of technical mastery.