Winsor newton water colour mediums are used to create an even wider variety of techniques and effects for your work, from increasing drying time, improving flow and changing gloss and texture, they provide limitless opportunities. The Winsor newton range also includes art masking fluids to keep areas of the paper white. Winsor newton water colour granulation medium increases the granulation of colour, giving a mottled or granular appearance to colours which usually give a smooth wash, such as Winsor red or Winsor blue or enhancing the effect of granulating colours such as viridian or French ultramarine. This medium is useful in all water colour techniques including landscape, seascape or figurative work. For maximum effect, dilute water colours with medium alone. By diluting the colour further with water, a variety of results can be achieved. Granulation medium is resoluble simply by re-wetting. Granulation is also greatly affected by different water colour papers. For maximum granulation use rough and for less granulation use a cold pressed / hot pressed surface.