Why is treated lumber called “pressure-treated”?

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Why is treated lumber called “pressure-treated”?

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The lumber is inserted into a sealed cylindrical tank about 7 feet in diameter by 60 feet long. The tank is completely filled with a diluted solution of chemical and water, and then pressurized. This pressure forces the chemical into the wood fibers, making it “pressure-treated.

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The lumber is inserted into a sealed cylindrical tank about 7 feet in diameter by 60 feet long. The tank is completely filled with a diluted solution of chemical and water, then pressurized. This pressure forces the chemical into the wood fibers.

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