| Author |
Subject |
zambocello
Registered User
(3/12/01 1:10:24 am)
Reply |
Humidity and temperature
We all know how our instruments
(unless you have a carbon fiber cello) shrink in dry weather and
swell in wet weather. Is relative humidity the only factor, or does
temperature also play a significant part? I once read an article
pertaining to cigar storage which argued that only relative humidity
was a factor; that a higher relative humidity level is not needed at
cooler temperatures for the same level of maintainence. But my cello
is certainly different at 65 degrees than at 85 degrees, even with
steady relative humidity. Does that moderate change of temperature
affect the wood or does wood have a different relationship between
temperature, total moisture, and relative humidity than does
air?
|
Andrew
Victor
Registered
User
(3/12/01 10:12:13 am)
Reply |
Relative Humidity
Relative humidity is the percentage
of moisture in the air RELATIVE to the total amount the air can hold
(when it is saturated - and any more will just be fog or condense
out as precipitation). Warm air can hold more moisture when
saturated than cold so the actual amount of moisture at a given
relative humidity is a very strong function of the air temperature.
At a given value of relative humidity, air at 85°F will contain
nearly twice (about 1.9 X) as much moisture as air at 65°C, and so
this greater amount may also be absorbed by the wood of your
instrument, given enough exposure time.
Andy
|
zambocello
Registered User
(3/12/01 11:04:35 pm)
Reply |
Right.
That's what I thought, but...........
.......the cigar storage article
pointed out that just as the air is able to hold less water when
cooler, cigar leaves are less able to absorb water at cooler
temperatures. If that's true it would apply to other porous
materials like wood, no?
|
Email This To a
Friend
Topic Commands
(Moderator only)
Rap
Resources 
