BS ISO 18918:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Photographic-plate housings: Storage enclosures
      and containers
      4.1 Individual enclosures
      4.2 Multiple-plate containers
5 Storage housings
      5.1 Drawer cabinets
      5.2 Shelving and cabinets
6 Storage rooms
      6.1 Medium-term storage rooms
      6.2 Extended-term storage rooms
7 Environmental conditions
      7.1 Introduction
      7.2 Temperature and humidity specifications for
             storage (see annexes D, E and F)
      7.3 Environmental conditioning requirements
      7.4 Air purity (see annex G)
8 Fire-protective storage (see annex H)
9 Photographic plate identification, handling and
      inspection (see annexes C, F and I)
      9.1 Identification
      9.2 Handling
      9.3 Inspection (reference) copies
Annex A (informative) Numbering system for related
                      International Standard
Annex B (informative) Photographic filling enclosures for
                      plates
Annex C (informative) Silver-image degradation
Annex D (informative) Humidity during storage
Annex E (informative) Temperature during storage
Annex F (informative) Historic records for photographic
                      plates
Annex G (informative) Air-entrained and gaseous impurities
Annex H (informative) Fire protection
Annex I (informative) Distinction between storage (record)
                      copies and work (reference) copies
Bibliography

Defines dark storage conditions, storage facilities and inspecting and handling methods for processed photographic plates having integral photographic layers and intended for record purposes.

1.1 This International Standard specifies dark storage conditions, storage facilities, and handling and inspecting procedures for processed photographic plates having integral photographic layers and intended for record purposes.

1.2 This International Standard is applicable to black-and-white, silver-image, gelatin, processed photographic plates as defined in 3.7.7. It is also applicable to medium-term and extended-term storage conditions as defined in 3.6 and 3.2, respectively.

No specific distinction is made, other than the degree of care, between photographic plates for medium-term or extended-term storage. Recommendations for plate storage relate to materials, methods, conditions, and forms of protection applicable specifically to plates defined in 1.1. However, these storage recommendations may also be applied to lacquered and opaque plates, to black-and-white plates altered by dyes or toners, colour plates and other historic photographic plates defined in 3.7.2 to 3.7.8.

1.3 It is not intended to predict or assign a useful lifetime to processed photographic plates stored in accordance with the specifications of this International Standard.

1.4 Recommendations for storage of photographic films are given in ISO 18911 and for storage of processed photographic reflection print material in ISO 18920.

Although there is some variation in recommended storage conditions among these types of photographic materials, recommended temperature and relative humidity ranges do overlap. If all three types of photographic materials are found in one collection or within one storage area, the temperature and relative humidity should be chosen so that all materials are stored within their recommended ranges.