Winsor & Newton Drawing Ink Vermillion 14ml :
Colour Number 680.
Winsor & Newton describe their drawing inks as the following;
"Our Drawing Inks have been used by illustrators since their introduction by Winsor & Newton in the 1890s, where the main requirement is 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."