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Standard

NS-EN ISO 11127-4:1997

Withdrawn

Note: This standard has a new edition: NS-EN ISO 11127-4:2020

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Abstract

The procedure includes examining a small quantity of the sample under the microscope and, if grains of different colours or diameter are present, selecting a few grains of each, placing the selected grains between two glass microscope slides and, whilst applying pressure, slowly moving one slide over the other with a reciprocating motion for 10 s, examining the glass surfaces for scratches. The object of the method is to assess whether the sample has a minimum hardness of 6 on Mohs' scale. Annex A gives information on the international standards series for non-metallic blast-cleaning abrasives ISO 11126 and ISO 11127.

Document information

  • Standard from SN
  • Published:
  • Withdrawn:
  • Edition: 1997-07
  • Version: 1
  • Document type: NAT
  • ICS 25.220.10
  • ICS 87.020
  • National Committee SN/K 51

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