This set contains high quality drawing inks with 4 "metallic" colors - gold, silver, white and black. Drawing inks are quick-drying and bright colors that can be applied with a brush, feather nozzle or airbrush and are widely used by designers, calligraphers and artists as well as illustrators. Winsor & Newton Drawing Inks have been used by illustrators since their introduction in the 1890s, where the primary requirement is color brightness. Today they are formulated from a series of soluble pigments in a superior shellac solution and offer unparalleled strength and color brightness. Drawing inks allow you to overlap different colors for an attractive mix of colors. All colors are water resistant except Gold and Silver. All Winsor & Newton drawing ink line colors are fully miscible to each other and are easily diluted with water. Quick-drying feature excellent grip on most surfaces