| Definition: | conditioning of a specimen with the object of removing or partly counter-acting the effect of its previous history with respect, principally, to the temperature and humidity to which it has been exposed
NOTE 1 – Preconditioning is sometimes known as normalizing.
NOTE 2 – Preconditioning usually precedes conditioning of a specimen. When the combination of temperature and humidity for conditioning is the same as that prescribed for preconditioning, the preconditioning may be said to take the place of conditioning.
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