Winsor & Newton Watercolour Ox Gall Liquid is a high-quality wetting agent designed to increase the flow and smoothness of watercolour washes and marbling techniques.

By adding this liquid to your watercolours, it improves the paint’s ability to spread evenly, helping to create soft, seamless blends and gradients.

Ideal for artists looking to achieve delicate transitions or complex marbled effects, this 75ml bottle is an essential tool for enhancing your watercolour techniques. Perfect for professional and amateur artists alike.