Abstract: The gliding properties of running surfaces for winter sports apparatus, e.g. skis and snowboards are improved by a mineral addition chosen from the sodalite group and tsaregorodtsevite-wadalite series or a mixture thereof. An ultramarine is especially preferred as the mineral additive. Gliding properties are similar to or improved in comparison to those obtainable with the addition of soot, carbon black or graphite. The mineral addition according to the invention can however be combined with the addition of soot, carbon black or graphite. The invention also opens up new possibilities in the coloration of running surfaces.

Abstract: The gliding properties of running surfaces for winter sports apparatus, e.g. skis and snowboards are improved by a mineral addition chosen from the sodalite group and tsaregorodtsevite-wadalite series or a mixture thereof. An ultramarine is especially preferred as the mineral additive. Gliding properties are similar to or improved in comparison to those obtainable with the addition of soot, carbon black or graphite. The mineral addition according to the invention can however be combined with the addition of soot, carbon black or graphite. The invention also opens up new possibilities in the coloration of running surfaces.

Abstract: The invention concerns a ski for gliding on the snow. The ski includes a longitudinal beam whose front end is turned up to form the shovel. The ski has a box structure on a portion of its length, and a sandwich structure on its remaining length. Preferably, the ski has a box structure at least in its median zone of the middle sole, and a sandwich structure at least in one of the front or rear zones.