Liquitex Professional Acrylic Ink made with finely ground artist quality pigments instead of colorants. They dry quickly, are permanent, water resistant and non-clogging, which makes them ideal for a variety of techniques from watercolour effects to stamping. Colour Name - Pyrrole Red - A bright warm red, highly transparent single pigment color. It is a clean red which mixes well with other colors. Pyrrole was first discovered in 1834 and its name comes from the Greek for reddish or fiery.