Winsor & Newton Oil Colour Varnishes are designed to enhance the creations of artists working with oil colour, such as Winsor & Newton’s Artist’s Oil and Winton Oil colour ranges. Giving temporary protection to recently completed oil paintings, Winsor & Newton Retouch Varnish dries quickly to a UV resistant, gloss finish. What is a Varnish? Traditionally a combination of drying oil, resin, and a thinner or solvent, Varnish is a transparent liquid which dries to form a hard, protective film. Why use a Varnish? In addition to preserving artwork, and offering protection against dirt and dust, a varnish evens out the final appearance of the paint, ensuring a uniform finish. Why choose Winsor & Newton Retouch Varnish? Suitable for use once oil paint is touch-dry, Winsor & Newton Retouch Varnish should be applied thinly. It should be noted that this varnish is not suitable for use as a medium. Who are Winsor & Newton? In 1832, William Winsor and Henry Newton introduced the first moist water colours to the world. Today, Winsor and Newton remain the premier choice for artists, offering a wide variety of fine art supplies including: oil, water colour, acrylic and alkyd paints, pastels, artists' brushes, canvases, papers and portfolios.