iandol on sat 13 oct 01
Freeze drying is a two stage process for removing moisture. First stage =
is freezing and this is to a good sub zero temperature. Second stage is =
evaporation or rather sublimation of the ice under vacuum. so the =
process is called Vacuum Freeze Drying. For those who wish to know more =
I have a reference to Knudsen, J. W., 1966. "Biological Techniques: =
Collecting,Preserving, and Illustrating Plants and Animals". Harper and =
Row. New York.
Ivor Lewis.
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