Abstract: An impregnation composition for a thermochemical modification of wood comprising a balanced aqueous-alcoholic solution and having the following chemical formulation, parts by mass:______________________________________ water-soluble oil-shale crude phenols 100 urea 28-36 formaldehyde 35-40 ammonia 13-15 ethylene glycol, its homolog or glycerol 3-10 ethanol 5-1,750 water 100-3,370. ______________________________________A process for preparing an impregnation composition consists in that a mixture of 100 parts by mass of said water-soluble oil-shale crude phenols, 28-36 parts by mass of urea, 3-10 parts by mass of ethylene glycol, a homolog thereof or glycerol, 6-1,025 parts by mass of ethanol and 3-1,492 parts by mass of water is heated at a temperature of from 60.degree. to 95.degree. C.

Abstract: The outside surfaces of a ski are made by treating a fibrous material with a compound based on phenolic resin and containing 60 to 80 mass percent of dry matter, said phenolic resin being curable at 100.degree. to 120.degree. C., whereupon the thus-treated fibrous material is allowed to stand at 70.degree. to 90.degree. C. for a period of time long enough for said phenolic resin to partially polycondense, whereupon said material is applied to the ski blank and the resultant intermediate product is exposed to the effect of a temperature ranging within 100.degree. and 120.degree. C. and a pressure ranging within 0.5 and 2.0 MPa for complete polycondensation of said phenolic resin to occur and for said fibrous material to firmly adhere to the ski blank at the same time.