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A laminated ski is a ski composed of two different types of wood which are glued together. A top layer of soft wood is glued to a thin layer under a surface of hardwood. This combination actually created skis which were much lighter and more maneuverable than the heavy, hardwood skis that preceded them. Although lighter and stronger, laminated skis did not wear well.
The water-soluble glues used at the time failed; warping and splitting along the glue edges (delaminating) occurred frequently and rapidly. In 1922, a Norwegian skier, Thorbjorn Nordby,developed strong, waterproof glue which stopped the problem of splitting, therefore developing a much tougher laminated ski. Research and design of laminated skis rapidly progressed. In 1933, a new design technology was introduced involving an outer hardwood shell completely encasing an inner layer of lighter wood, successfully eliminating spontaneously splitting glue lines. This early design eventually evolved into an advanced laminating technique which is referred to today as single-shell casing technology.
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