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ISO 4324:1977
Surface active agents -- Powders and granules -- Measurement of the angle of repose
The measurement is carried out in the following way: Determination of the base angle of the cone obtained by passing a given volume of the product in the form of powder or granules through a special funnel placed at a fixed height above a completely flat and level plate. The method is also applicable to other powders and granules with comparable properties.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]