Underpainting is a fundamental technique in oil painting, serving as the initial layer that sets the stage for the subsequent application of paint. This preliminary layer is essential for establishing the composition, tonal values, and overall structure of a painting. By understanding the role of underpainting and mastering its techniques, artists can enhance the depth, luminosity, and realism of their artworks. This article delves into the significance of underpainting, various methods employed, and illustrative examples from art history.
The Significance of Underpainting
Underpainting provides a solid foundation for an oil painting, offering several key benefits:
Establishing Composition: It allows artists to outline the basic shapes and structure of the composition, ensuring accurate proportions and spatial relationships.
Defining Tonal Values: By focusing on light and dark values, underpainting helps in achieving a balanced and dynamic range of tones in the final painting.
Guiding Color Application: A well-executed underpainting can influence the subsequent layers of color, adding depth and complexity to the hues.
Enhancing Luminosity: Transparent glazes applied over a light underpainting can create a luminous effect, as the light reflects off the underlying layers.
Techniques of Underpainting
There are several techniques used in underpainting, each with its unique characteristics and applications:
Grisaille: This technique involves painting the underlayer in shades of gray. It is particularly useful for focusing on the tonal values without the distraction of color. Grisaille can be left visible in the final painting to add depth and contrast.
Imprimatura: This involves applying a thin, transparent wash of a single color over the canvas. The imprimatura layer serves as a neutral base that can unify the colors applied on top and reduce the brightness of the white canvas.
Verdaccio: Originating from Italian Renaissance painting, verdaccio is a greenish underpainting used for flesh tones. It helps in achieving realistic skin tones by neutralizing the reds and providing a harmonious base.
Bistre: This brown underpainting technique uses shades of brown to establish the composition and tonal values. Bistre is often used for its warm, earthy quality.
Examples from Art History
Many renowned artists have employed underpainting techniques to achieve their masterpieces. Here are a few notable examples:
Leonardo da Vinci: Leonardo frequently used underpainting in his works, such as in the "Mona Lisa." He applied a brownish underpainting to build the structure and tonal values, which he then layered with delicate glazes to achieve the final effect.
Jan van Eyck: Known for his meticulous technique, van Eyck often used a detailed underpainting in grisaille for his portraits and religious scenes. This allowed him to achieve a high degree of realism and depth.
Rembrandt van Rijn: Rembrandt utilized underpainting to enhance the dramatic lighting and textures in his works. For example, in "The Night Watch," he used a dark underpainting to establish the shadows and form, which he then built upon with thick, impasto layers of paint.
Titian: This Venetian master used a warm, reddish-brown underpainting called "bolus" to create a rich, glowing effect in his paintings. This technique is evident in works like "The Venus of Urbino," where the underpainting adds warmth and depth to the skin tones.
Practical Steps for Underpainting
For artists looking to incorporate underpainting into their practice, here are some practical steps:
Prepare the Canvas: Start with a primed canvas or panel. Apply a thin layer of gesso if necessary to create a smooth surface.
Choose the Medium: Decide on the type of underpainting (grisaille, imprimatura, verdaccio, or bistre) based on the desired effect.
Sketch the Composition: Lightly sketch the composition with pencil or charcoal to serve as a guide.
Apply the Underpainting: Use a large brush to apply the underpainting in broad strokes, focusing on establishing the major shapes and tonal values.
Refine the Details: Once the basic layer is dry, refine the details with smaller brushes, ensuring the underpainting accurately represents the light and shadow.
Layer the Colors: After the underpainting is completely dry, begin layering the colors, allowing the underpainting to show through where appropriate to enhance the depth and luminosity.
Conclusion
Underpainting is a vital technique in oil painting that can significantly enhance the final artwork's quality. By establishing the composition, defining tonal values, and guiding the color application, underpainting sets the stage for a successful painting. Mastering this technique can lead to more dynamic, realistic, and visually compelling artworks, as demonstrated by the great masters of art history. Whether you are a novice or an experienced artist, incorporating underpainting into your practice can elevate your oil painting skills and outcomes.