NEN EN ISO/IEC 15421 : 2002

Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Symbols and abbreviated terms
6 Physical requirements
  6.1 Material
       6.1.1 Dimensional stability
       6.1.2 Archival properties
  6.2 Physical requirements controlled by the
       manufacturing process
       6.2.1 Target bar width
       6.2.2 Bar width adjustment
  6.3 Tolerances
       6.3.1 Tolerance A - all symbologies
       6.3.2 Tolerance B - two width symbologies
       6.3.3 Tolerance C - (n,k) symbologies
       6.3.4 Tolerance D - all symbologies
  6.4 Bar edge characteristics
       6.4.1 Bar edge conformance
       6.4.2 Bar edge gradient
  6.5 Defects
  6.6 Quiet zones
  6.7 Corner marks
  6.8 Optical densities
       6.8.1 Minimum density (Dmin)
       6.8.2 Maximum density (Dmax)
  6.9 Orientation
  6.10 Polarity
  6.11 Encodation
  6.12 Human readable interpretation
7 Test methods
  7.1 Bar and space width measurement
       7.1.1 Conditions for dimensional measurements
       7.1.2 Calculation of the achieved bar width
             adjustment
  7.2 Test report and traceability
Annex A (informative) Optical density profiles