BS ISO/IEC 8441-1:1991

1 Scope
2 Normative references
3 Definitions
4 General
4.1 Materials
4.2 Tape reels
4.3 Tape wind
4.4 Packaging
5 Test conditions
5.1 General
5.2 Conditioning
5.3 Test environment
6 Dimensions
6.1 Tape width
6.2 Tape length
6.3 Tape thickness
7 Physical properties
7.1 Yield strength
7.2 Elongation under stress
8 Performance
8.1 Reference test system
8.2 Sensitivity
8.3 Wavelength response
8.4 Output level uniformity (long term)
8.5 Instantaneous nonuniformity (dropouts)
8.6 Signal-to-noise ratio
8.7 Ease of erasure
8.8 Electrical surface resistance
8.9 Environmental performance
8.10 Durability
8.11 Abrasivity
Annexes
A Glass- and metal-flanged tape reels
B Wear of recording heads
C Environmental conditions
C.1 General
C.2 Normal operating conditions
C.3 Extended operating conditions
C.4 Severe operating conditions
C.5 Shipping and short-term storage
C.6 Extended shipping and short-term storage
C.7 Recommended long-term storage
C.8 Deterioration of tape arising from exposure to
       adverse environmental conditions
D Severe operating conditions
D.1 Application
D.2 Conditions
D.3 Environmental performance tests for limited
       duration recording under severe conditions
D.3.1 Definition of severe conditions
D.3.2 Requirement
D.3.3 Test procedure
E Surface electrical resistance testing
E.1 Scope
E.2 Test specimens
E.3 Apparatus
E.3.1 Electrodes for testing insulation resistance
E.3.2 Electrodes for testing volume and surface
       resistance
E.3.3 Electrode materials
E.3.4 Direct-current potential
E.3.5 Measuring equipment
E.3.6 Switches and keys
E.4 Procedure
E.4.1 Conditioning of specimens
E.4.2 Precautions in mounting specimens
E.4.3 Method of measuring resistance
E.4.4 Insulation resistance determination
E.4.5 Volume and surface resistance determination
E.4.6 Surface resistance determination
E.5 Report
F Tape abrasivity testing
F.1 Scope
F.2 Principle
F.3 Apparatus
F.3.1 Sensor
F.3.2 Dummy head assembly
F.3.3 Tape abrasivity meter
F.3.4 Reference tape
F.4 Procedure
F.4.1 Cleaning and measuring
F.4.2 Requirement
G Bibliography

Gives requirements for unrecorded magnetic tape designed for high density digital recording having the following characteristics: nominal thickness 25.4 micron m, longitudinal magnetic orientation, and coercivity 72 kA/m max. These tapes are suitable for interchange in accordance with ISO/IEC 8441-2. Requirements for packaging are also included.