| Most preprint
material on nitrate base consists of a silver image.
While early color processes often used dye images
for release prints, the preprint material consisted
of one or more silver images. Therefore, storage
areas for nitrate base film color or B & W require
the same physical conditions. Ambient temperature
should be below 50° F and RH between 40% and
50%. Lower RH would retard decomposition, but would
increase brittleness. Active
Working Storage of Nitrate Film
Temperature and RH conditions for a working vault
should be below 70° F and between 25% and
60% RH.
All nitrate base film in either
a working or archival status must be stored in
an approved vented cabinet or vault. Standards
for the construction of approved storage areas
have been established by the National Board of
Fire Underwriters. Recommendations for meeting
these standards are outlined in N.B.F.U Pamphlet
40, obtainable from N.B.F.U., 85 John Street,
New York, NY. |
