Use pencils for years (both for flipchart as well as whiteboard) from Staedtler. The quality is very good, the pins do not dry out, if you should forget me, they close with the cap - which can in many presentations / trainings occur quite times. The nib is very good, the color keeps on the flip chart sheets for a longer time without fading too big. Highly recommended. Who 4 colors suffice, which is well served by this package. There is also the alternative variant with 6 colors (yellow and purple still with it) ...
