BS 3880-1:1971

Cooperating organizations
Foreword
Specification
Introduction
1. Specification for the paper material and test
    methods and the coiling of unpunched tape
1.1 Scope
1.1.1 General
1.1.2 Notes on the metric dimensions
1.2 Test conditions and methods of test
1.2.1 Sampling
1.2.2 Test conditions
1.2.3 Conditioning of test samples
1.3 Dimensions
1.3.1 Width
1.3.2 Thickness
1.4 Chemical properties
1.4.1 Hydrogen ion content
1.4.2 Ash content
1.4.3 Grit content
1.4.4 Lubricating additives
1.4.5 Composition and quality
1.5 Physical properties
1.5.1 Basis weight
1.5.2 Strength
1.5.3 Dimensional stability
1.5.4 Percentage of light transmission
1.5.5 Electrical properties; bulk conductivity
1.5.6 Printability
1.5.7 Pre-printing
1.5.8 Punchability and punch wear
1.5.9 Colour
1.6 Coiling of unpunched tape
1.6.1 Core of coils
1.6.2 Outer diameter
1.6.3 End-of-tape marker
1.6.4 General quality
1.6.5 Tightness of coiling
2. Optional additions to Section 1.
2.1 Optional additional properties relating to storage
      and static electricity
2.1.1 General
2.1.2 Storage requirements
2.1.3 Electrostatic conditions
2.2 Chemical and electrostatic properties
2.2.1 Chloride and sulphate limits
2.2.2 Surface resistivity limits
Appendices
A. Method of sampling paper tape for testing
B. Determination of the aqua regia insoluble matter
    in ash (grit)
C. Determination of basis weight - method of reporting
D. Determination of dimensional stability
E. Measurement of light transmission
F. Derivation of metric dimensions
G. Details of core for spooling 25.4 mm wide paper type
H. Determination of surface resistivity

Specifies the properties of the paper material and test methods. Fundamental dimensions of unpunched tape are given together with a recommended core for interchange.