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Plywood  

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  • Wood board consisting of a number of thin layers of rotary-cut veneers glued together so that the grain of each layer is at right angles to the grain of the adjacent layer. Several thickness of plies of wood glued together so that the grain of any one ply is at right angles to the grain of the adjacent ply. Wood is weak across the grain, strong the long way of the grain. This material has the following properties: it prevents warping, movements, cracks and contractions or expansions, defects to which solid woods are subject due to heat or humidity. Traditionally, a central softwood board was used, to which more noble wood veneers were glued on both sides. Plywoods were used somewhat before the mid-nineteenth century, when furniture construction procedures changed. Technical advances since WWII have changed plywood to a versatile product with properties subject to scientific controls, extending its usefulness and beauty. Its scope in furniture making is broader than ever.The basic idea of ??plywood was perceived by early woodworkers familiar with grain and their properties.

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https://data.arxiuvalencia.eu/vocabulary/c_61d3a8b3

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