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2. Wood warping - Wikipedia

   en.wikipedia.org/wiki/Wood_warping

   Warping primarily occurs due to uneven expansion or contraction caused by changes in moisture content. Warping can occur in wood considered "dry" (wood can take up and release moisture indefinitely [ 1 ] ) when it takes up moisture unevenly, or when it is allowed to return to its "dry" equilibrium state unevenly, too slowly, or too quickly.

3. Moisture meter - Wikipedia

   en.wikipedia.org/wiki/Moisture_meter

   Moisture content is measured in the same manner as wood and displayed in Wood Moisture Equivalent, or WME. WME is the theoretical moisture content that the substrate would contain if it were wood. This ability to locate and measure moisture anomalies can help manage and control indoor air quality by locating and preventing hidden mold growth ...

4. Equilibrium moisture content - Wikipedia

   en.wikipedia.org/wiki/Equilibrium_moisture_content

   If the wood is placed in an environment at a particular temperature and relative humidity, its moisture content will generally begin to change in time, until it is finally in equilibrium with its surroundings, and the moisture content no longer changes in time. This moisture content is the EMC of the wood for that temperature and relative humidity.

5. Janka hardness test - Wikipedia

   en.wikipedia.org/wiki/Janka_hardness_test

   When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...

6. Water content - Wikipedia

   en.wikipedia.org/wiki/Water_content

   Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, crops, or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation.

7. Lumber - Wikipedia

   en.wikipedia.org/wiki/Lumber

   Wood is a hygroscopic material, which means it naturally absorbs and releases water to balance its internal moisture content with the surrounding environment. The moisture content of wood is measured by the weight of water as a percentage of the oven-dry weight of the wood fiber. The key to controlling decay is controlling moisture.