These iridescent calligraphy colours are shimmering and highly reflective. They are lightfast, waterproof, archival, and permanent. Made from the finest ground pigments, the unmatched colour intensity gives you the ability to cover dark surfaces. Great for use on paper, wood, board, metal, and some plastics. It dries smooth and even every time. No start and stop marks. Great for use with pens (both calligraphy and dip pens), airbrushes, and brushes. Designed for calligraphy, to accent watercolour work, or anywhere where you need to add a magical shine and shimmer that only pigment-based iridescent colour can provide.