Product Description Graham gouache derives its opacity from pigment concentration, resulting in strong, clean mixes; this set features 5 basic colors: -Azo Yellow -Naphthol Red -Cobalt Blue -Ivory Black -Titanium White Fine Art Gouache Each color has been formulated with pure, Northwest honey for layered application without cracking. Balanced quantities of gum arabic and water are combined with large amounts of pigment to achieve a high degree of flow for strong brush strokes and direct, smooth application without loss of brilliance. Our Gouache is crafted with high performance lightfast pigments. The nature of the each pigment creates variations of opacity. We leave the addition of white to the artist.