1,063,765. Veneering. HARRIS LEBUS Ltd. Jan. 17, 1966 [Feb. 12, 1965], No. 6216/65. Heading B5L. A method of veneering comprises using an adhesive containing water and closing the platens of a press and then momentarily opening and closing the platens at least once during the pressing operation before the adhesive is fully cured, the platens being heated to a temperature such that the water in the adhesive boils and steam and volatile substances escape when the platens are opened, curing of the adhesive continuing during the open period and on closing the platens again. The platens may be heated to only 250 F. or to at least 275 F. and up to 300 F. or higher and be opened at least twice or reciprocated so as to open and close a large number of times.; The veneer may be applied to both sides of a core or to one side only, the other side being damped so that the resulting veneered panel is substantially flat or slightly convex; without damping, the panel may be slightly concave. The veneer may be of wood, impregnated paper or metal foil and the core may be cheap wood or compressed fibrous vegetable material such as plywood, blockboard, hardboard or particle board. In one example, the core consists of 5/ 8 inch thick multi-plywood and the veneer is of sapele 0À6 mm. thick applied to one side of the core using an aqueous urea-formaldehyde adhesive at 2 1b. per 100 square feet of core. The temperature of the platens was 300 F. and the total time of pressing was 24 seconds with the platens being opened and closed twice at 8 and 16 seconds.