Plywood consists of number of thin sheets of wood(veneer) which are pressed and bonded together by some bonding materials like glue or synthetic adhesive under temperature of 350 degree Fahrenheit to 500 degree Fahrenheit.The grains of each sheet are bonded right angles to each other to uniform strength in both direction and reduce shrinkage.Plywood is relatively lighter then other plank of same strength. Sometimes plywood is covered with plastic sheet for attractive appearance, zero water absorbance, reduction of decay etc. Plywood is specially used where some amount of bending is necessary. Generally not less then three sheets of woods are used for plywood.
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