His work is defined by a mastery of wash drawings and small-scale compositions. Aartman frequently used grey or sepia washes to create depth and atmosphere without relying on a wide palette. In his interior scenes, such as those featuring tea-drinking or musical parties, he records the domestic habits of the period with a quiet, observational eye. His maritime works, including 'Schepen op een winderige rivier,' demonstrate a clear understanding of rigging and hull construction. This accuracy makes his drawings valuable to both art historians and those interested in naval history.

Modern collectors value Aartman for his ability to document the private lives of the past. His drawings of social gatherings offer a view of the interiors of the eighteenth century, showing how people interacted in their leisure time. The scale of his work makes it suitable for contemporary homes where space is often at a premium. His restrained use of colour and focus on line and shadow ensures these prints remain visually balanced in diverse interior settings. These works provide a factual record of eighteenth-century domesticity.