Abstract A core for use in the manufacture of furniture which comprises a plurality of superimposed thin, flexible sheets which have been adhesively secured together, and then formed into a U-shaped core, with the core being used in the manufacture of furniture, for instance, as the backing portion of a chair. The core is manufactured by superimposing a plurality of thin, flexible sheets, one upon the other, by high speed equipment, and simultaneously applying adhesive to the sheets as the superimposition process proceeds to form a stack. The stack is then positioned in matched pressure dies and with the action of pressure the core of the present invention is formed into a U-shape, although many other shapes are contemplated.