Swix TSP7 Violet - TSP7 is a versatile powder suitable for normal sub-freezing winter conditions. Powder makes it convenient to work with and get a good end result. For fresh, old or artificial snow. Good on clean snow. The speed of the iron should be about 8-10 seconds on a skating ski. It is important to have a good iron to get efficient powder melting. TSP7 can be used alone as a racing powder or as a base for topcoats.