A set of 6 essential colours from the Colorex range of watercolour inks.Colorex is a dye based watercolour ink that can either provide a brilliant, opaque colour or can be diluted with water for a more delicate wash of colour, much like a watercolour paint.The highly concentrated Colorex brilliant watercolour ink withstands heavy dilution in water. Pure or diluted, it can be applied with different tools: airbrush, brush, pen etc. and on various surfaces such as paper, Bristol board and canvas boards.  Due to the opacity of the colour when undiluted, it can be used on dark paper to great effect. Also suitable for dip pens and quills for use in calligraphy.Colours: Light Yellow, Turkish Red, Ultramarine Blue, Spring Green, Sepia and Ivory Black.6 x 20ml.