BS ISO/TR 12031:2000

Foreword
Introduction
1 Scope
2 References
3 Terms and definitions
4 Inspection conditions
5 Equipment and supplies
      5.1 General
      5.2 Light box and film rewinds for 16 mm and 35 mm
             film
      5.3 Eye loupe (eye glass)
      5.4 Microscope
      5.5 Specular light source
      5.6 Black velvet
      5.7 Inspection gloves
6 Sampling method
      6.1 General
      6.2 Division into survey groups
7 Inspection procedure
      7.1 General
      7.2 Procedure for all microfilms
      7.3 Checks for all microfilms
      7.4 Additional checks for roll film
      7.5 Additional checks for jackets
      7.6 Additional checks for aperture cards
8 Inspection reporting
      8.1 Classification
      8.2 Data collection, general
      8.3 History and description of group or collection
      8.4 Individual microfilm inspection report
      8.5 Data analysis (optional)
9 Types of defects
      9.1 General
      9.2 Microbiological growths
      9.3 Redox blemishes
      9.4 Residual processing chemicals
      9.5 Emulsion adhesion
      9.6 Separation of the emulsion from the film base
      9.7 Brittleness
      9.8 Base shrinkage
10 Remedial action
      10.1 General
      10.2 Subsequent re-inspections
Annex A - Determination of base type
Annex B - Factors affecting deterioration
      B.1 - General
      B.2 - Inappropriate choice of film material
      B.3 - Processing
            B.3.1 - Improper fixing
            B.3.2 - Improper washing
            B.3.3 - Insufficient drying
      B.4 - Improper climatic conditions during storage
Annex C - Examples of types of defects
      C.1 - Microbiological growths
      C.2 - Redox blemishes
            C.2.1 - Exposed leader
            C.2.2 - Silver sheen
      C.3 - Separation of the emulsion from the film base

Applicable to all kinds of silver-gelatin microfilm, in roll, aperture card, jacket or microfiche format. Covers the equipment and methods required for identification and monitoring of deterioration. Acts to identify the extent and nature of the problem and will eventually give a sound basis for any remedial action necessary.

This Technical Report applies to all forms of silver-gelatin microfilm, whether in roll, aperture card, jacket or microfiche format. It describes the equipment and procedures necessary to identify and monitor deterioration. This information serves to identify the extent and nature of the problem and will ultimately provide a sound basis for any remedial action that may be required.