This set offers a selection of 6 x 14ml tubes. The colours have been specially selected for optimum results when colour mixing to produce strong, bright mixes. Includes: Primary Yellow, Primary Red, Primary Blue, Permanent Green Middle, Ivory Black, Zinc White.Winsor & Newton Designer's Gouache is a finely ground, water based paint, well suited to illustration with pen, brush, or airbrush.All Designer's Gouache colours are fully compatible with Winsor & Newton Artists' and Cotman watercolorsGouache differs from watercolour in that the particles are larger, the ratio of pigment to water is much higher, and an additional, inert, white pigment such as chalk may also be present. This makes gouache heavier and more opaque, with greater reflective qualities..