ISO 697:1981 Preview
Surface active agents -- Washing powders -- Determination of apparent density -- Method by measuring the mass of a given volume
This standard was last reviewed and confirmed in 2016. Therefore this version remains current.
The method consists in determining the mass of powder in receiver of known dimensions, after filling with the sample from a funnel of specified shape under specified conditions. The method is applicable to free flowing powders and, provided that an appropriate funnel is used, to powders which have a tendency to cake. In the case of powder containing lumps, the method is applicable only if these can be disintegrated readily without braeking down the particles of the powder.
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