Winsor & Newton Designers Gouache is a range of brilliant opaque water colours for designers, illustrators and fine artists.It is made by selecting only the very best pigments, the highest grade of gums and wetting agents.Even flow, exceptional tinting strength, and gives a matt finish.The versatility of Designers Gouache means that it can be used with brush, airbrush and ruling pen on most types of paper and board .As the colours are water soluble, they can also be mixed with other water colours to produce further combinations of opacity and transparency.- Colour: Phthalo Blue