I test Granulation Medium to make even wash colours sediment. Maybe. http://lezleydavidson.com/granulation-medium-for-watercolour/ Click the links below for more product information on the items used in the video. Series 7 Sable Brushes: http://tiny.cc/Series7SableBrushes Escoda Sable Brushes: http://tiny.cc/EscodaSableBrushes Fluid Watercolour Block: http://tiny.cc/FluidWCBlock Arches Watercolour Block: http://tiny.cc/ArchesWCBlock Watercolour Granulation Medium: http://tiny.cc/WCGranulationMedium Watercolour Texture Medium: http://tiny.cc/WCTextureMedium Watercolour Blending Medium: http://tiny.cc/WCBlendingMedium Watercolour Iridescent Medium: http://tiny.cc/WCIridescentMedium Permanent Masking Fluid: http://tiny.cc/PermanentMaskingFluid