BS ISO/TR 12031:2000
Current
The latest, up-to-date edition.
Micrographics. Inspection of silver-gelatin microforms for evidence of deterioration
Hardcopy , PDF
English
09-15-2000
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
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