Wood is affected by humidity. Wood expands and contracts as the moisture in the air changes. If I make a wood piece here in the New Mexican desert and send it east it will most likely expand because of the moisure in the east. Vice versa - a piece made on the east coast and ships west will likely shrivel a bit, dry out, and crack. So extra care is needed in understanding wood and it's environment.

"RH" - relative humidity is at a stable range at between 45 and 55 percent. Wood exposed to high ...
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