Sorry, guys. I've taught science too many years to accept that the relative humidity change has anything to do with the change in wood moisture content. Relative humidity changes as temperature changes, but the actual amount of moisture may indeed stay the same. I understand all about dew point, etc., but actual moisture content does not change because the relative humidity does UNLESS the temperature stays the same. A sealed container of air (or wood)may hold X amount of moisture. If it is heated, its relative humidity goes down, because it is capable of holding more moisture at a higher temperature. The converse is true upon cooling. True, wood being a solid, there is less difference caused by temperature than in air. But the content doesn't necessarily change with the relative humidity reading which depends upon the temperature at which the humidity reading is taken. Ray T. Bentley, RPT Alton, IL Ready to retire this spring after 37+ years of teaching. ----- Original Message ----- From: <vem@email.byu.edu> To: <caut@ptg.org> Sent: Tuesday, January 22, 2002 3:12 PM Subject: Re: Temp fluctuation affect? > No, but the wood moisture content would change (be higher with a lower heat and > lower with a higher heat) because of the relative humidity change. > > - It's true that lowering the temp will decrease the relative humidity > - reading, but it will NOT mean that more moisture is present. Relative > - humidity is just that...relative! The absolute amount of moisture present > - will not change solely by lowering the temperature. > - > - > - -- > - Ray T. Bentley, RPT > - Alton, IL > - ray@bentley.net > - www.ray.bentley.net > - > > vince mrykalo > > >
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