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Brick Brick is a man made stone, which is made by clay being formed into a rectangle, and dried in a kiln or the sun. The oldest bricks in the world date back to 6500BC. Modern clay bricks are made from * Soft mud * Dry press * Wire cut Soft Mud This is the most cost effective way of making bricks, hence the most popular. The clay is mixed with 20-25 per cent sand to reduce shrinking then ground with clay and water. The clay is then pressed into a mould using a hydrolic press and ' burned' in a kiln. Dry Press The dry press brick has a thicker clay mix, hence makes sharper more formed bricks. This is quite an expensive way to make bricks as it has a longer and more intense burn time. Wire Cut These are the lightest of all bricks. The clay mix is 20-25 per cent water. This mix is...

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