Winsor & Newton Drawing Inks have been used by illustrators since their introduction in the 1890's, where the main requirement was brilliance of colour.Today they are formulated from a series of soluble dyes in a superior shellac solution.These inks can be applied with brush, dip pen or airbrush and are widely used by designers, calligraphers and artists as well as illustrators.All colours in the Winsor & Newton line of Drawing Inks are fully intermixable, and they are easily dilluted (with distilled water).Fast drying and water resistant, they have excellent adhesion on most surfaces.