|Staedtler Lumocolor Permanent pens come with every attention to detail you would expect from such a renowned manufacturer. They can be used on almost any surface, including CDís and DVDís. The ink is fast drying, smudge proof and waterproof on the majority of surfaces. It comes in 9 brilliant colours, of which the black, yellow, orange and brown are all lightfast. The nib is very strong and the Dry Safe technology means it can be left uncapped for days without drying up. As well as all that, it also comes in 4 nib sizes. So it may well be the only marker you ever need!