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How does chiaroscuro use light and shade in drawings?

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Watercolor painting by Berthe Morisot showing Edma seated on a sofa in a floral dress with her young daughter Jeanne beside her, both facing slightly right. — Drawing *The Artist's Sister, Edma, with Her Daughter, Jeanne*, watercolor over graphite on paper by Berthe Morisot, 1872; in the collection of the National Gallery of Art, Washington, D.C.

In the context of drawing, chiaroscuro—derived from the Italian words for "light" and "dark"—is a technique used to represent light and shadow to define three-dimensional objects. By employing an extensive gradation of light and darkness, artists create the perception of depth on a two-dimensional surface.12

Rather than using flat outlines, the technique relies on the interplay of illumination and shadow to model form. Historically, masters such as Leonardo da Vinci and Rembrandt utilized these tonal shifts not only to establish volume but also to achieve significant psychological and emotional effects. In its most dramatic form, known as tenebrism, artists use harsh, contrasting light to isolate figures and heighten tension.1

While the term is broadly applied to any work dependent on these tonal gradations, it also refers specifically to a woodcut process that uses multiple blocks to replicate the layered, tonal appearance of wash or watercolor drawings.1