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HISTORICAL ARCHAEOLOGY <[log in to unmask]>
Date:
Fri, 2 Sep 2005 02:35:03 -0400
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Carl and others,

There is a world of difference between freezing wet things and freeze drying 
frozen things. Let me explain. When you place soggy wet documents in a meat 
locker, the water turns to ice crystals. When you place frozen documents in a 
freeze drier, the ice turns to vapor and blows away in the machine. Try to think 
of photos of one of those really high mountains with snowy peaks, where vapor 
blows off the top. The vapor is ice that is converted by very low 
temperatures to gas and is carried away on the wind. What is left in a freeze drier is a 
dry document. This is your goal with wet soggy documents is to freeze the ice, 
then vaporize it from the document. 

Ron May
Legacy 106, Inc.

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