This medium improves the flow of the colour making it ideal for blending or fine detail work. It provides an even matt finish and increases the water resistance of the colour when dry. This medium contains clear binder and matting agents giving you no loss of colour depth when used with Winsor & Newton Artists' Acrylic.
I bought this medium in order to use it on its own, unmixed, as a sort of acrylic binder. It's a bit more opaque than I thought. It's still OK though. Yann Roirand (Sunderland, United Kingdom) on 27 Aug 2013