Kodak D-31 - Manual (Page 20)

D-31 June 2002 17
Summary of Requirements for
Storage and Preservation of
Records on Kodak Microfilm
Storage Facilities
The type of storage vault, safe, cabinet, or area
selected must be based on the value of the film
records and their intended storage life. In general,
one roll per container is recommended.
Containers should be stored in metal cabinets.
Cabinets should be spaced in the room so there
are no stagnant air pockets or localized areas
where temperature and humidity may reach
higher levels than the general condition. If
humidity is not controlled, sealed metal or glass
containers are required.
Although the same general storage principles
apply to medium-term and long-term storage
records, much greater care must be taken to
obtain maximum protection for long-term storage
records; makeshift or temporary arrangements
should not be considered.
In summary, Table 3 indicates the conditions that
are considered suitable for black-and-white silver-
gelatin, thermally processed silver, diazo, and
vesicular Kodak Microfilms.
Table 3: Storage Temperature and Relative Humidity
NOTE: If the storage temperature is sufficiently low or if the air where the film is to be handled is quite
moist, leave the film in its closed container until it warms up to approximate room temperature.
Otherwise, condensation of moisture will occur on the cold film surfaces.
Film Type Base
Extended and Long Term Medium Term
Relative
Humidity
Temperature
(Max.)
Relative
Humidity
Temperature
(Max.)
°C °F °C °F
Silver-Gelatin Cellulose ester
(Acetate)
20–50%
20–40%
20–30% 2
5
7 35.6
41.0
44.6 20–60% 25 77
Silver-Gelatin Polyester 30–40% 21 69.8 20–60% 25 77
Thermally Processed Silver Polyester 15–30% 21 69.8 20–60% 25 77
Diazo Polyester 20–50%
20–50%
20–50% -10
-3
2
14
26.6
35.6
20–60% 25 77
Vesicular Polyester 15–50% 20 70 20–60% 25 77
Electro-Photographic Polyester 15–50% 20 70 20–60% 25 77
Photo-Plastic Polyester 15–50% 20 70 20–60% 25 77
Color Cellulose ester
(Acetate)
20-30%
20–40%
-10
-3
14
26.6
20–60%
20–60% 25
25 77
77
Color Polyester 25–30% 2 35.6 20–60% 25 77