Freeze-drying to the rescue for moldy, tsunami-damaged documents – Asahi Shimbun

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Freeze-drying to the rescue for moldy, tsunami-damaged documents
Asahi Shimbun
The process is similar to that used for freeze-drying food, in which water is first frozen then converted into vapor and removed. When it comes to treating cultural properties, this Not wasting any time, Kozuma proposed using vacuum freeze-drying