Tamped volume

The tamped volume or apparent density is determined according to Part 11 of ISO 787. The material is passed through a sieve to disperse agglomerates and placed in tarred graduated measuring cylinder. The cylinder is then placed in a tamping volumeter and tamped for 250 revolutions. The volume read from the cylinder is divided by the mass of powder and given as a percent. 

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A Scott volumeter is suggested as being suitable for measuring the density of metal powders." The method gives a bulk density of the metal powder and results can be related to the measurement of tamped volume (see below). The Scott volumeter is more complex and precise than the ISO method. The result is given as apparent density. 

Tamped Density and Tamped Volume (ISO 787, Part II). The tamped density is the ratio of mass to volume, while the tamped volume is the ratio of volume to mass after tamping under specified conditions. These quantities provide information about the volume requirements of the products. 

It depends on the true density, shape and size of the particle. Information on tamped volume determination is in ISO 787-11. 

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