Created in 1974, AD® Marker was one of many in the long line of solvent based markers used for advertising, fashion and conceptual illustration from the 1950's - 1980's. The brilliant colored, transparent marker strokes are a classic feature of this era of illustration. Today, AD® Marker is the top of its class for Art and Design. It's one of the few xylene markers still available in the market, and has out performed many of its competitors over the years. Their laydown, ink capacity and special effects are truly unique. It's no wonder why many artists say there are markers, and then there are AD® MARKERS!