Mastering the White Underpainting Technique

White underpainting is a foundational technique for creating luminous skies in gouache landscapes. By utilizing the white of the paper or a thin layer of white gouache, you establish a light base that simplifies the color mixing process. This method allows the paint to vibrate and glow when you layer subsequent colors on top.

Why White Underpainting Works

• It lifts the value of the paper to create instant highlights without lifting previous layers.
• It simplifies the color palette by reducing the number of darks needed for shadows.
• It provides a smooth base for layering transparent watercolor glazes.

Step-by-Step Application

• Load your brush with pure white gouache and thin it with water for a transparent wash.
• Apply the paint to the sky area using broad, sweeping strokes to mimic cloud movement.
• Let the paper dry completely before adding any other colors to avoid muddying the mix.

Mastering this technique requires patience and observation of how light interacts with the paper surface.