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 - Transparent Raw Umber - A sheer dark brown color. Raw umber is made from natural brown clays found in the earth and is named after Umbria, a region in Italy where it was first mined.