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.
General information
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Status: WithdrawnPublication date: 1993-12Stage: Withdrawal of International Standard [95.99]
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Edition: 1Number of pages: 3
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Technical Committee :ISO/TC 35/SC 12ICS :25.220.10
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Life cycle
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Now
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Revised by
WithdrawnISO 11127-4:2011
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