An additive that loosens the surface tension of water within the acrylic film. Increases flow, allowing the artist to apply areas of flat colour evenly without changing the colour strength. Winsor & Newton has always been core to the world of art materials. They proudly maintain the pledge of manufacturing “The World’s Finest Artist’s Materials”. This is as true now as it was when the company was founded in 1832, and they take their relationship with the artist very seriously. Winsor & Newton have built their reputation on the quality and reliability of their products, combined with continual product development, improvement and innovation. However, while keeping true to the principles laid down by William Winsor and Henry Newton in the 1800’s they actively embrace new ideas, new technologies, and search the world for the best raw materials available.