METHOD FOR DETERMINING NORMAL RANGE OF VARIATION OF EQUILIBRIUM MOISTURE CONTENT

摘要

The invention relates to a method for determining the normal range of variation of equilibrium moisture content in wooden samples, in order to determine some archaeometric characteristics involved in the authentication and in compatibility or compatibilization studies referring to certain treatments, in the new wood placement or in interventions in active presentation and restoration of old wood. According to the invention, the method consists in performing the gravimetric analysis of a sample exsiccated in exsiccators, at a moisture content of over 99%, up to a constant mass, corresponding to the saturation point of the material hygroscopicity, being then dehydrated again, at a residual atmospheric humidity of less than 10%, up to a constant mass corresponding to the separation limit between the reversible and irreversible material hygroscopicity, the values comprised between the two hydration and dehydration curves representing the normal range of variation of the equilibrium moisture content in terms of reversible hygroscopicity.