Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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hysteresis

The differential value of a property, contingent upon approaching a known value of a related condition from a higher or lower level. A material such as paper, for example, that is to be conditioned at 50% relative humidity, will contain more moisture when this level is approached from above 50% than when approached from below. Hysteresis has a considerable influence in governing the dimensional stability of paper.




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