Table 3: Storage Temperature And Relative Humidity; Summary Of Requirements For Storage And Preservation Of Records On Kodak Microfilm; Storage Facilities - Kodak D-31 Storage Manual

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.

Table 3: Storage Temperature and Relative Humidity

Film Type
Silver-Gelatin
Silver-Gelatin
Thermally Processed Silver
Diazo
Vesicular
Electro-Photographic
Photo-Plastic
Color
Color
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.
D-31 June 2002
Extended and Long Term
Base
Relative
Humidity
Cellulose ester 20–50%
(Acetate)
20–40%
20–30%
Polyester 30–40%
Polyester 15–30%
Polyester 20–50%
20–50%
20–50%
Polyester 15–50%
Polyester 15–50%
Polyester 15–50%
Cellulose ester 20-30%
(Acetate)
20–40%
Polyester 25–30%
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.
Temperature
(Max.)
°C °F
2 35.6
5 41.0
7 44.6
21 69.8
21 69.8
-10 14
-3 26.6
2 35.6
20 70
20 70
20 70
-10 14
-3 26.6
2 35.6
Medium Term
Temperature
Relative
(Max.)
Humidity
°C °F
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
20–60% 25 77
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