hydration
1. A term applied to the condition of materials
containing water of absorption, crystallization,
or imbibition. In papermaking, hydration refers to
the chemical or mechanical (or both) treatment of
paper fibers, other than cooking or bleaching,
which takes place before sheet formation on the
papermaking machine. It relates especially to
altered sheet characteristics, including density,
formation, opacity, and strength. 2. The paper
pulp characteristics resulting from the above
treatment. (17 , 42 , 276 )
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