Winsor & Newton Ox Gall Liquid Medium

Winsor & Newton Ox Gall Liquid is a traditional watercolour wetting agent designed to improve flow, spread, and colour absorption. By reducing the surface tension of water, it helps washes lay down more evenly, prevents beading on hard‑sized papers, and allows pigments to move smoothly across the surface.

This medium is especially useful for artists who want consistent, streak‑free washes, or who work on papers that resist wetting. A few drops mixed with watercolour or rinse water can dramatically enhance flow, making it easier to achieve soft gradients, broad washes, and delicate wet‑in‑wet effects.

A staple in professional watercolour practice, Ox Gall Liquid offers greater control, smoother application, and improved handling of stubborn or granulating pigments.

Key Features

• Improves flow and spread of watercolour

• Reduces surface tension for smoother washes

• Helps colour absorb evenly into the paper

• Prevents beading on hard‑sized or resistant papers

• Enhances wet‑in‑wet and gradient techniques

• Useful for controlling granulating or heavy pigments

• Only a few drops needed per mix

Ideal For

• Achieving smooth, even washes without streaks

• Improving flow on heavily sized or textured papers

• Enhancing wet‑in‑wet techniques and soft blends

• Watercolourists who want more control over pigment movement

• Artists working with granulating or stubborn pigments

• Large‑scale washes, skies, and backgrounds