Permanent Markers come in a wide range of styles, colours & produced by a wide range of manufacturers. Permanent markers are designed to be durable & not to be removed by water or solvents. The main difference between permanent and non-permanent markers is the ink resin which prevents the ink being removed from water. The most common uses for permanent markers are for writing on cds, cards, dvd’s, glass & many more. They are most used in educational institutions or business marking documentation.