A new development in ski waxing has come from the understanding of static charge build up on the base of skies. As a ski passes across the sharp points of the snow, there becomes a large amount of static charge that builds on the base of the ski. This charge builds up more rapidly the colder and sharper the snow is. The charge build up is another force that slows a ski while in motion. The waxing solution to this is to add an anti-static layer of wax. This is most often graphite. The little amount of graphite prevents the build up of too much charge.

https://www.google.com/search?q=charge+diagram&espv=2&biw=1106&bih=599&source=lnms&tbm=isch&sa=X&ei=9Ng1VcOzAYTuoASAgoG4Dg&ved=0CAYQ_AUoAQ&dpr=1.5#tbm=isch&q=electrostatic+charge&imgrc=HhU73q-b0ChbeM%253A%3B3r_62enJAH3M0M%3Bhttp%253A%252F%252Fwww.gcsescience.com%252FCharged-Rod-Attracting-Neutral-Object.gif%3Bhttp%253A%252F%252Fwww.gcsescience.com%252Fpse5-electrostatic-charge-neutral-attract.htm%3B440%3B260

As seen above, the ski becomes negatively charged and then has an attractive force with the snow as represented by the square box.