The manufacture of Douai has been finely controlled. The amounts of raw materials are calculated by the computer to achieve accuracy.
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The production process of Douai is of efficiency. Its raw materials are extracted by automatic machines and are treated by computers.
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Douai has been tested to meet the international building materials standards in terms of properties such as toughness, hardness, and tensile strength.
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The production of Douai is highly efficient. The raw materials are treated with the help of computer operation, which only produces a little building materials waste.
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For Douai to be produced, raw materials, water, and additives are required. All primarily related building materials are delivered to the factory and stored properly.
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The product has enough hardness. It is able to resist deformation, which is determined by a standard test where the surface resistance to indentation is measured.