MOISTURE RELATIONSHIPS OF PHOTOGRAPHIC FILM
P.Z. ADELSTEIN, J.-L. BIGOURDAN, & J.M. REILLY
- Experimental results on the effect of temperature on the moisture equilibrium curve of photographic film agree with published information.
- Recent studies of moisture equilibration rates at low temperatures provide more comprehensive data than had been available. These investigations indicate that while low-temperature equilibration is slow, it is still appreciable.
- The use of moisture-proof packing is recommended for storage in frost-free freezers or in cold storage vaults where the relative humidity exceeds 40%.
- Analysis of gelatin degradation studies at conditions both above and below the glass transition temperature show that linear Arrhenius relationships may be obtained, although situations have been reported where this is not true.
This work was done under a grant from the Office of Preservation, National Endowment for the Humanities.